I have Exchange 2003 Standard with SP2. I am unable to Mount the Mailbox Store because I mistakenly changed the permissions on the Security tab and added a "Deny" statement for "Authenticated Users". I can still get into the perms of the Mailbox Store but it won't accept any changes to fix the problem. When I say OK I get an error message as follows:
Facility: LDAP Provider
ID No: 80070005
Exchange System Manager
Currently the system is still functioning without the mailbox store mounted. I have NOT rebooted the server for fear that Exchange won't function.