I am not sure what I did, but I can't find the M: dive for Exchange 2000. Only thing I can think of is that I installed Veritas Backup Exec for Exchange 2000. However, even when I uninstalled Backup Exec, I still can't get the M: come back. I haven't found anything wrong else wrong with Exchange 2000.
Please check to see if any of these situations may be causing the problem.-Is the Information Store service running?
-Do you have any stores mounted?
-ARE IIS and your Default Web Site running?
-Does Internet Service Manager show any red stop signs?
-Are you able to access mailboxes or public folders on this server?
-Any events in the application or other event logs?
-Was M: possibly in use already, or perhaps recently mapped to something else. If so, perhaps another drive letter is being used?
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