Emails disappear from outlook when cached exchanged mode is switched off

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.
Thanks
michael_pollardAsked:
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wolfcamelCommented:
outlook also has a folder called synch issues which may give some clues - otherwise the normal event logs on wither the server or workstation may gives some clues as to the cause.
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wolfcamelCommented:
go into send receive settings and make sure all the folders and subfolders are ticked for synchronising - somehow some messages cant have synched..
otherwise you will need to create a local pst - copy everything in cached mode to the pst, and the copy them back in non cached mode.
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michael_pollardAuthor Commented:
Thanks wolfcamel. I have already done this for one user but I was rather hoping there was some setting within exchange or group policies which would reverse caching. I have about 500 exchange users and 20 have complained about missing emails, and appointments since I enabled the group policy last night. The rest either don't have cached mode switched on or have not yet noticed anything missing.
As an example the Local File contains 43 emails in a folder. The same folder on the server contains 3. I thought the local copy would only contain a cache of what is on the server and that the emails would not actually get moved to the local copy and removed off the server completely. I want all email to be held on the server and not on the local PC's. I have searched the internet for info relating to this but I haven't got anything back.
I could copy to PST and reimport back in to the mailbox for the 20 users I know of but I have no definate way of knowing that their are other users out there with the same setting.
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wolfcamelCommented:
to be honest i dont completely see how it has happened. I can only guess that there was an issue with the server, people moved mail into folders - which would then happen first locally - especially if they were offline - and then the change hasnt managed to successfully replicate back to the server.
Typically just pressing send/receive or going into the folder would force it to sych back.
I would look for server or local errors during the sync
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michael_pollardAuthor Commented:
I see your point. I spoke to the particular user regarding their emails. She would have moved from her inbox to her subfolder under her inbox. If she had moved her files into the folder during an exchange outage maybe when the server came back online the folders didn't sync back up. Could this be the case and if so where could I see this error. There is no sync folder in her mailbox, not that I can see.
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michael_pollardAuthor Commented:
Thanks I'll follow that up.
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