Hi, I have added a delegate for a room mailbox and now i am trying to remove it from the delegates list of the resource mailbox using Exchange Management Shell. Set-MailboxCalendarSettings-Identity ConferenceRoom -ResourceDelegates <delegates> The problem i encounter is that the ResourceDelegates parameter donc accept a null value so i cannot remove the user account from this list. Any idea to solve the problem? Many thanks

hi, I found this "When the Set-MailboxCalendarSettings cmdlet is run to re-apply/add delegates for a resource calendar the original delegate's permissions are removed. The delegate is still displayed when running the Get-MailboxCalendarSettings cmdlet however if you look at the permissions on the resource calendar, the delegates permissions have been removed. To re-grant permissions on the resource calendar you must run a "Set-MailboxCalendarSettings resource_alias -ResourceDelegatesnull" command. Afterwards you can re-grant permissions to the intended user. Until SP1 is released, I would recommend running this command before making any changes to resource delegates." source : http://knicksmith.blogspot.com/2007_05_01_archive.html