Update Remove-AuthenticationPolicy.md

Author: chrisda

exchange/exchange-ps/exchange/Remove-AuthenticationPolicy.md

@@ -66,14 +66,7 @@ Accept wildcard characters: False
 ### -AllowLegacyExchangeTokens
 This parameter is available only in the cloud-based service.
 
-The AllowLegacyExchangeTokens switch returns your tenant to its previous state before changes were made to allow or block legacy Exchange tokens for Outlook add-ins. Legacy Exchange tokens include Exchange user identity and callback tokens.
-
-This switch applies to your entire tenant even if you specify an authentication policy in the Identity parameter. You don't need to specify a value with this switch.
-
-**Important**:
-
-- The AllowLegacyExchangeTokens switch disregards other authentication policy parameters used in the same command. We recommend running separate commands for other authentication policy changes.
-- Legacy Exchange tokens will eventually be blocked by default in all cloud-based organizations. For more information, see [Nested app authentication and Outlook legacy tokens deprecation FAQ](https://learn.microsoft.com/office/dev/add-ins/outlook/faq-nested-app-auth-outlook-legacy-tokens#what-is-the-timeline-for-shutting-down-legacy-exchange-online-tokens).
+This parameter is reserved for internal Microsoft use.
 
 ```yaml
 Type: SwitchParameter