I have a user that is trying to give 'delegate' right to her contacts. When attempting, she gets the following error message:The Delegates settings were not saved correctly. Unable to modify Outlook folder. Internal MAPI error: An unsupported interface was requested of an object property. Contact your administrator.The server is a Windows 2003 SP1 server running Exchange 2003 SP2 (Version 6.5 Build 7638.2)

Did you tried running Outlook.exe /cleanrules sometimes corrupt rules cause issues to save delegates Vinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|

Hi, I would like to know: 1. If the user adds other internal mailbox enabled users as delegate, whether the issue can be reproduced 2. If the user configurse Outlook Profile on another known good Outlook Client, whether the issue can be reproduced. 3. Please let me know the Outlook version the user used to add Delegate Mike