Hello, I've given the group of mailbox administrators (Mail-enabled Universal Security group) GenericAll Permissions at database level for every database. This way they have full access to all mailboxes. But now this group has been added to the resourcedelegates list on every mailbox. How is this possible and how can I remove this resoucedelegate without deleting the correct delegates Powershell set-calendarprocessing for user gives error: "resourcedelegates can only be set on resource mailboxes" Environment: Exchange 2010 SP2 DAG Windows 2008 R2 Please advise FrederikFrederik

Hi I found a thread that with same error, perhaps the steps of the solution there could help you Add a resourcedelegate to a user mailbox http://social.technet.microsoft.com/Forums/en-IE/exchange2010/thread/3b647a47-abab-4438-8c16-56117d5ebbcc First confirm the mailboxes you would like to modify is a user mailbox or a resource mailbox. Hope that helps CheersZi Feng TechNet Community Support

Hi, these are all user mailboxes. In the forum thread you send is mentionned to that it is impossible to add resourcedelegates to user mailboxes. I get te same error. Figured out where these delegates come from; We are migrating from Lotus Notes, Quest Notes Migrator picked them up from Acces control List in Notes and added them to the delegates and not to the ACE's. Any idea how we can clean this resourcedelegate field without removing the correct delegates? regards FrederikFrederik

Hi Helles, Any update on this issue? Please feel free to let us know if you need any assistance. Thanks, Andy