Hello Everyone, We are currently seeing an issue when we change the delegate of a resource mailbox, the new and old delegates are getting the requests. The old delegate is not associated with the resource in any way and has been verified many times. The Version we are running is MS Exchange 2010 SP2. Steps we have tried is creating a new resource mailbox and changing delegates which does work, the problem exists with resources created months and years ago. Any help on this would be appreciated. Thanks.