Merge pull request #11041 from joannawang-msft/patch-6

Update Remove-ServicePrincipal.md

Author: chrisda

exchange/exchange-ps/exchange/Remove-ServicePrincipal.md

@@ -48,7 +48,7 @@ The Identity parameter specifies the service principal that you want to remove.
 - Distinguished name (DN)
 - GUID
 - AppId
-- ServiceId
+- ObjectId
 
 ```yaml
 Type: ServicePrincipalIdParameter