- You should have created a large placeholder file on the Logs drive. Delete it and mount the Mailbox stores.
- Figure out why the logs did not clear. Chances are your Backup software didn’t backup the Exchange server…
- If you did not create a placeholder file, then quickly Find your .edb files. Open Command Prompt, run “eseutil /mh edb.edb” and look for the STATE line. If it was a clean shutdown then you can remove all old log files, none are needed. If it was a dirty shutdown then you need to look for the line that says “log required” and it will tell you which you need to keep. Move the others to another partition temporarily. Mount the stores. Then figure out what happened. If all is functioning properly then delete the unneeded logs.