We just had this issue recently and solved it using MFCMapi from Microsoft. We found these corrupted 'rules' for delegation after a user was removed.
http://exchangeshare.wordpress.com/2008/04/10/delete-corrupted-hidden-or-stale-rules-from-mailbox-with-mfcmapi/ I think technet has the same walk through , but this popped first in google ... -----Original Message----- From: Dan Cooper [mailto:d...@180amsterdam.com] Sent: Wednesday, September 14, 2011 4:26 PM To: MS-Exchange Admin Issues Subject: re: find and remove 'Ghost' Delegates Thanks Jim, Interestingly enough: ADUC: Shows publicDelgates assigned to CN=ex-User3 etc... ADSIedit: Shows publicDelgates No assigned Delegates I have removed it from the ADUC and will wait a few hours and see what happens. Kathleen, if this does not do the trick I will do a re-build, thanks. --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist