Hello all, I'm new to the list. I am in the process of migrating from Exchange 5.5 to E2K. I was able to move about 7 mailboxes when I started off then all of a sudden the MAPI client bit the dust. Below is a brief statement of what I've tracked down so far. If you have any questions please feel free to ask. What am I missing here? The information store starts ok and the mailbox storage mounts fine, which is what Technet suggests. I also get Event ID 9167 and 1008 with the same error. Replication seems to be fine. I've removed the AV s/w. IS this installation hosed? Thanks in advance, Garland Event Type: Error Event Source: MSExchangeAdmin Event Category: MAPI Session Event ID: 9175 Date: 6/11/2002 Time: 10:04:11 AM User: N/A Computer: SAKIC Description: The MAPI call 'OpenMsgStore' failed with the following error: The attempt to log on to the Microsoft Exchange Server computer has failed. The MAPI provider failed. Microsoft Exchange Server Information Store ID no: 8004011d-0512-00000000 Garland Mac Neill Systems Administrator Solbourne <mailto:gmacneill@xxxxxxxxxxxxx> gmacneill@xxxxxxxxxxxxx