An unauthorized delegate operation was attempted

I enabled the use of Sefautil using the instructions located here. I wanted to add myself as a delegate for another user to allow users to send Lync/Skype for Business Meetings calendar invites on behalf of another user. I ran this command: .\Sefautil.exe /Server:LyncFe01.domain.com sip:John.Smith@domain.com /adddelegate:Habib.Mankal@domain.com everytime i ran the above command it would not […]