I'm thinking BES has something to do with this. Although I cannot locate the user, this server is the only server has mailboxes with 250 open messages via the BES service account. My question is doesn't BES release the messages after it scans these BES user's mailboxes? If not this would surely degrade performance having many BES users. ________________________________ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Chong, James Sent: Wednesday, March 22, 2006 10:06 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] User does not exist! Getting event id 9646. I'm not so much as interested in the event, but the user it talks about (user37534619) does not exist, and cannot find him anywhere! This event for this particular user started last Saturday and has repeated every 30mins. I went through every store on the particular ex server, do not see this mailbox, searched through AD, LDAP queries etc. Mapi session "/O=American Red Cross/OU=ARCHQ/cn=Recipients/cn=user37534619" exceeded the maximum of 250 objects of type "objtMessage".