MicrosoftDocs · Ruchika-mittal01 · Dec 9, 2025 · Dec 9, 2025 · Dec 9, 2025 · Dec 9, 2025
diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-ADPermission.md b/exchange/exchange-ps/ExchangePowerShell/Get-ADPermission.md
@@ -66,6 +66,8 @@ This example returns the permissions that have been granted to the user Chris on
 
 The Identity parameter specifies the identity of the object for which you're retrieving permissions. You can retrieve the permissions for any Active Directory object using its distinguished name (DN). If the object is an Exchange object, you might be able to use the object's name. If the DN or the object's name contains spaces, enclose the value in quotation marks (").
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: ADRawEntryIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-ADSite.md b/exchange/exchange-ps/ExchangePowerShell/Get-ADSite.md
@@ -49,6 +49,8 @@ This example displays the configuration details for the Active Directory site na
 
 The Identity parameter specifies the identity of the Active Directory site for which you want to view configuration details. The identity can be expressed as a GUID or the Active Directory site name. If the Active Directory site name includes spaces, enclose the name in quotation marks (").
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AdSiteIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-ADSiteLink.md b/exchange/exchange-ps/ExchangePowerShell/Get-ADSiteLink.md
@@ -54,6 +54,8 @@ This example returns a list of all IP site links in your organization that have
 
 The Identity parameter specifies the name or GUID of the IP site link for which you want to view configuration information.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AdSiteLinkIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-ATPBuiltInProtectionRule.md b/exchange/exchange-ps/ExchangePowerShell/Get-ATPBuiltInProtectionRule.md
@@ -53,6 +53,8 @@ The Identity parameter specifies the rule that you want to view. You can use any
 
 The name of the only rule is ATP Built-In Protection Rule.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: DehydrateableRuleIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-ATPProtectionPolicyRule.md b/exchange/exchange-ps/ExchangePowerShell/Get-ATPProtectionPolicyRule.md
@@ -62,6 +62,8 @@ The Identity parameter specifies the rule that you want to view. You can use any
 
 By default, the available rules (if they exist) are named Standard Preset Security Policy and Strict Preset Security Policy.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: RuleIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AcceptedDomain.md b/exchange/exchange-ps/ExchangePowerShell/Get-AcceptedDomain.md
@@ -55,6 +55,8 @@ This example lists all the authoritative accepted domains in your organization.
 
 The Identity parameter specifies a string value for the accepted domain. Enter either the GUID or the name of the accepted domain.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AcceptedDomainIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncDevice.md b/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncDevice.md
@@ -87,6 +87,8 @@ The Identity parameter specifies the ActiveSync device that you want to view. Yo
 - DeviceIdentity
 - Multi-TenantID
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: ActiveSyncDeviceIdParameter
 Parameter Sets: Identity

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncDeviceAccessRule.md b/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncDeviceAccessRule.md
@@ -56,6 +56,8 @@ This example lists all device access rules set up on the server.
 
 The Identity parameter specifies the unique identifier for the device access rule.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: ActiveSyncDeviceAccessRuleIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncDeviceAutoblockThreshold.md b/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncDeviceAutoblockThreshold.md
@@ -49,6 +49,8 @@ This example retrieves the threshold settings for the Autoblock threshold rule f
 
 The Identity parameter specifies the name of the Autoblock threshold rule.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: ActiveSyncDeviceAutoblockThresholdIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncDeviceClass.md b/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncDeviceClass.md
@@ -62,6 +62,8 @@ The Identity parameter specifies the ActiveSync device class that you want to vi
 - Distinguished name (DN)
 - GUID
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: ActiveSyncDeviceClassIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncDeviceStatistics.md b/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncDeviceStatistics.md
@@ -83,6 +83,8 @@ This example retrieves the statistics for the mobile phone configured to synchro
 
 The Identity parameter specifies the user's device ID. If the Mailbox parameter is specified, the Identity parameter is disabled.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: ActiveSyncDeviceIdParameter
 Parameter Sets: Identity

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncMailboxPolicy.md b/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncMailboxPolicy.md
@@ -65,6 +65,8 @@ This example returns the policy settings for the Mobile Device mailbox policy na
 
 The Identity parameter specifies the policy name.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: MailboxPolicyIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncOrganizationSettings.md b/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncOrganizationSettings.md
@@ -47,6 +47,8 @@ This example retrieves the ActiveSync organization settings.
 
 The Identity parameter specifies the ActiveSync organization settings object that you want to view. The default name of this object is Mobile Mailbox Settings.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: ActiveSyncOrganizationSettingsIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncVirtualDirectory.md b/exchange/exchange-ps/ExchangePowerShell/Get-ActiveSyncVirtualDirectory.md
@@ -83,6 +83,8 @@ The Name value uses the syntax `"VirtualDirectoryName (WebsiteName)"` from the p
 
 You can't use the Identity and Server parameters in the same command.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: VirtualDirectoryIdParameter
 Parameter Sets: Identity

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AdaptiveScope.md b/exchange/exchange-ps/ExchangePowerShell/Get-AdaptiveScope.md
@@ -58,6 +58,8 @@ The Identity parameter specifies the adaptive scope that you want to view. You c
 - Distinguished name (DN)
 - GUID
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: ComplianceRuleIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AddressBookPolicy.md b/exchange/exchange-ps/ExchangePowerShell/Get-AddressBookPolicy.md
@@ -63,6 +63,8 @@ This example returns information about all address book policies for which the o
 
 The Identity parameter specifies the identity of the address book policy.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: MailboxPolicyIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AddressList.md b/exchange/exchange-ps/ExchangePowerShell/Get-AddressList.md
@@ -80,6 +80,8 @@ The Identity parameter specifies the address list that you want to view. You can
 
 You can't use this parameter with the Container or SearchText parameters.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AddressListIdParameter
 Parameter Sets: Identity

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AddressRewriteEntry.md b/exchange/exchange-ps/ExchangePowerShell/Get-AddressRewriteEntry.md
@@ -54,6 +54,8 @@ This example returns the detailed configuration of a single address rewrite entr
 
 The Identity parameter specifies the address rewrite entry to be retrieved. The Identity parameter accepts a GUID or the unique address rewrite name. You can omit the Identity parameter label.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AddressRewriteEntryIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AdministrativeUnit.md b/exchange/exchange-ps/ExchangePowerShell/Get-AdministrativeUnit.md
@@ -64,6 +64,8 @@ The Identity parameter specifies the administrative unit that you want to view.
 - Distinguished name (DN)
 - GUID (different value than Name)
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AdministrativeUnitIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AntiPhishPolicy.md b/exchange/exchange-ps/ExchangePowerShell/Get-AntiPhishPolicy.md
@@ -60,6 +60,8 @@ The Identity parameter specifies the antiphish policy that you want to view. You
 - Distinguished name (DN)
 - GUID
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AntiPhishPolicyIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AntiPhishRule.md b/exchange/exchange-ps/ExchangePowerShell/Get-AntiPhishRule.md
@@ -58,6 +58,8 @@ The Identity parameter specifies the antiphish rule that you want to view. You c
 - Distinguished name (DN)
 - GUID
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: RuleIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-App.md b/exchange/exchange-ps/ExchangePowerShell/Get-App.md
@@ -66,6 +66,8 @@ This example displays the summary list of apps installed by administrators for t
 
 The Identity parameter specifies the GUID of the app that you want to view. To find the GUID value of an app, run the command Get-App | Format-Table -Auto DisplayName,AppId.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AppIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AppRetentionCompliancePolicy.md b/exchange/exchange-ps/ExchangePowerShell/Get-AppRetentionCompliancePolicy.md
@@ -62,6 +62,8 @@ The Identity parameter specifies the app retention compliance policy that you wa
 - Distinguished name (DN)
 - GUID
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: PolicyIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AppRetentionComplianceRule.md b/exchange/exchange-ps/ExchangePowerShell/Get-AppRetentionComplianceRule.md
@@ -56,6 +56,8 @@ The Identity parameter specifies the app retention compliance rule that you want
 - Distinguished name (DN)
 - GUID
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: ComplianceRuleIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-ApplicationAccessPolicy.md b/exchange/exchange-ps/ExchangePowerShell/Get-ApplicationAccessPolicy.md
@@ -55,6 +55,8 @@ This example returns detailed information for the specified application access p
 
 The Identity parameter specifies the application access policy that you want to view. To find the Identity value for the policy, run the command Get-ApplicationAccessPolicy | Format-List Identity,Description,ScopeName,AccessRight,AppID.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: ApplicationAccessPolicyIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AtpPolicyForO365.md b/exchange/exchange-ps/ExchangePowerShell/Get-AtpPolicyForO365.md
@@ -56,6 +56,8 @@ This example returns detailed information about the default policy.
 
 The Identity parameter specifies the policy that you want to modify. There's only one policy named Default.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AtpPolicyForO365IdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AttachmentFilterEntry.md b/exchange/exchange-ps/ExchangePowerShell/Get-AttachmentFilterEntry.md
@@ -66,6 +66,8 @@ The Identity parameter specifies which attachment filter entry the command retri
 - ContentType: This value matches the attachment filter entry against the MIME content type.
 - FileName: This value matches the attachment filter entry against the simple file name.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: String
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AuditLogSearch.md b/exchange/exchange-ps/ExchangePowerShell/Get-AuditLogSearch.md
@@ -59,6 +59,8 @@ This example returns a list of current administrator audit log searches.
 
 The Identity parameter specifies the GUID for an audit log search. You can run the command Get-AuditLogSearch | Format-List Identity to display the GUIDs for all current audit log searches.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AuditLogSearchIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AuthRedirect.md b/exchange/exchange-ps/ExchangePowerShell/Get-AuthRedirect.md
@@ -56,6 +56,8 @@ This example shows detailed information about the OAuth redirection object named
 
 The Identity parameter specifies the existing OAuth redirection object that you want to view. The object name uses the syntax `AuthRedirect-Bearer-GUID`.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AuthRedirectIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AuthServer.md b/exchange/exchange-ps/ExchangePowerShell/Get-AuthServer.md
@@ -60,6 +60,8 @@ The Identity parameter specifies the authorization server object that you want t
 - Distinguished name (DN)
 - GUID
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AuthServerIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AuthenticationPolicy.md b/exchange/exchange-ps/ExchangePowerShell/Get-AuthenticationPolicy.md
@@ -58,6 +58,8 @@ The Identity parameter specifies the authentication policy you want to view. You
 - Distinguished name (DN)
 - GUID
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AuthPolicyIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AutoSensitivityLabelPolicy.md b/exchange/exchange-ps/ExchangePowerShell/Get-AutoSensitivityLabelPolicy.md
@@ -54,6 +54,8 @@ The Identity parameter specifies the auto-labeling policy that you want to view.
 - Distinguished name (DN)
 - GUID
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: PolicyIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AutoSensitivityLabelRule.md b/exchange/exchange-ps/ExchangePowerShell/Get-AutoSensitivityLabelRule.md
@@ -56,6 +56,8 @@ The Identity parameter specifies the auto-labeling policy rule that you want to
 - Distinguished name (DN)
 - GUID
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: ComplianceRuleIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AutodiscoverVirtualDirectory.md b/exchange/exchange-ps/ExchangePowerShell/Get-AutodiscoverVirtualDirectory.md
@@ -81,6 +81,8 @@ The Name value uses the syntax `"VirtualDirectoryName (WebsiteName)"` from the p
 
 You can't use the Identity and Server parameters in the same command.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: VirtualDirectoryIdParameter
 Parameter Sets: Identity

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AvailabilityAddressSpace.md b/exchange/exchange-ps/ExchangePowerShell/Get-AvailabilityAddressSpace.md
@@ -60,6 +60,8 @@ The Identity parameter specifies the availability address space that you want to
 - Distinguished name (DN)
 - GUID
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AvailabilityAddressSpaceIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AvailabilityConfig.md b/exchange/exchange-ps/ExchangePowerShell/Get-AvailabilityConfig.md
@@ -52,6 +52,8 @@ In Exchange Online, this examples returns the tenant IDs that free/busy informat
 
 The Identity parameter specifies the availability configuration that you want to view. You don't need to use this parameter, because there's only one availability configuration object named Availability Configuration in any organization.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: OrganizationIdParameter
 Parameter Sets: (All)

diff --git a/exchange/exchange-ps/ExchangePowerShell/Get-AvailabilityReportOutage.md b/exchange/exchange-ps/ExchangePowerShell/Get-AvailabilityReportOutage.md
@@ -56,6 +56,8 @@ This example returns all outages reported for Microsoft Outlook services at all
 
 The Identity parameter specifies the outage.
 
+**Caution**: The value $null or a non-existent value for the Identity parameter returns *all* objects as if you ran the Get- command without the Identity parameter. Verify any lists of values for the Identity parameter are accurate and don't contain non-existent $null values.
+
 ```yaml
 Type: AvailabilityReportOutageIdParameter
 Parameter Sets: (All)