I setup a group policy which disables cached exchange mode for new users. However some users who already have cached exchange mode switched on lost some of their emails within subfolders under their inbox. I removed the group policy again and the emails came back for the users. I went into one of the users mailboxes and manuall ticked off cached exchange mode. The emails disappeared again. I went into the users OWA and the email were not there either. They only exist in the ost file. I want all emails to be held on the exchange server and not on ost files on the users computers. Is ther anyway to move the emails back to the users mailbox apart from manually moving them across. I have about 20 users with a similar issue.