For some reason the M drive on our Exchange2000 server is completely full. We are doing backups which are set to flush the logs. I have asked all users to delete anything they can to clean up. The application log is full of these error messages: -------------------------------------------------------------------------------------------------------------------------------------------------- Microsoft Exchange System Attendant failed to read the membership of group 'cn=Exchange Domain Servers,cn=Users,dc=MyDomain,dc=lan'. Error code '80072030'. Please check whether the local computer is a member of the group. If it is not, stop all the Microsoft Exchange services, add the local computer into the group manually and restart all the services. 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 ----------------------------------------------------------------------------------------------------------------------------------------------------- I believe that if I can somehow get the M drive cleaned up then these errors will go away. Any ideas? TIA. Ron