We have had to recover from catastrophic disk failure on our Exchange 2010 Mail Stores. After restoring from backups and re-mounting the databases the live mail is working fine, but the archived mail stores seem to have issues. When some users check their archive using OWA in Chrome and expand a folder, they are getting an error saying "The server operation timed out. Please try again later." There were no apparent problems with the backups.
This is happening for some users, but not all. Has anyone come across this before?