Update exchange/exchange-ps/exchange/Set-AuthenticationPolicy.md

Co-authored-by: David Chesnut <davech@microsoft.com>

Author: chrisda

exchange/exchange-ps/exchange/Set-AuthenticationPolicy.md

@@ -361,7 +361,7 @@ Accept wildcard characters: False
 ### -AllowLegacyExchangeTokens
 This parameter is available only in the cloud-based service.
 
-The AllowLegacyExchangeTokens switch specifies whether to allow legacy Exchange tokens for Outlook add-ins. You don't need to specify a value with this switch.
+The AllowLegacyExchangeTokens switch specifies to allow legacy Exchange tokens to be issued to Outlook add-ins. You don't need to specify a value with this switch.
 
 Legacy Exchange tokens include Exchange user identity and callback tokens.