When you try to add a delegated user on the Delegates tab in the Outlook options after you added the user and defined the folder permissions, you receive the following error message:
The delegate settings were not saved correctly. Unable to activate send-on-behalf-of list. You do not have sufficient permission to perform this operation on this object.
This also occurs when you try to modify existing delegations.
For delegate access to be assigned successfully, the Write Personal Information must be correct for the SELF account. Additionally, when the user logs on to Exchange Server, Exchange Server must return a domain controller (DC) and a global catalog (GC) that are local to the user account's domain so that the publicDelegates attribute can be written.
For more information about this issue, click the following article number to view the article in the Microsoft Knowledge Base:
813929 (http://support.microsoft.com/kb/813929/ ) A user cannot set another user as a delegate in Outlook
To work around this issue, add Write Personal Information permission to the SELF account on the user who is trying to add the delegate. To do this, follow these steps:
- Open Active Directory Users and Computers, and then click Advanced Features if it is not already selected on the View menu.
- Expand Your_Server, and then locate the user’s Organizational Unit (OU).
- In the right pane, right-click the user who is experiencing the delegate issue, and then click Properties.
- Click the Security tab, locate the SELF account, and then click Write Personal Information .
- Make sure the Write permissions check box is selected, and then click OK.
I have had this problem on an SBS 2003 domain. The "Write Personal Information" attribute even seems to reset to a particular user, so it appears not to be a permanent fix.
When giving access to Person A's calendar to Person B, it appears to give Person B "Send on Behalf of Person A" privileges, even if the "send meeting requests" option is not used. I don't know why it does this, but is an unexpected side-effect of using delegation to perform this task, that may be a real security hole.
Maybe a better option is to right-click on the calendar and assign permissions there.