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Broken offline files - client-side cache is newer than server

ShineOn
ShineOn asked
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Client has Win7 laptop, folder redirection for desktop and documents.  

Unbeknownst to anyone, his offline sync / sync center stopped and were disabled, but he is still using the client-side cached versions of his files.  
Because of this his files are as much as a year or more out of sync with what is stored on the server and the newer, more-valid files are on his laptop.

I am concerned (because it doesn't seem clearly documented anywhere I looked), that re-enabling offline files and re-establishing sync will result in his client-side cache being overlaid by the much older files in his user\home$\username folder on the server.

Are my fears unfounded?  Will re-enabling offline files cause the newer files in his client-side cache to win the argument and bring his redirected server-based folder up to date with what's in client-side cache?  Or will it clear the client-side cache and load all the old versions of the flile, wiping out over a year's worth of work?
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System Administrator
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Distinguished Expert 2018
Commented:
First, create a backup on the client before taking any action!!!

We experienced something similar recently with a few users (offline files on the client was newer than on the server). This is what we found out:
1. Offline files (My Documents) were overwritten by files from the server so users lost their data.
2. However, Windows keeps the copy of offline files in C:\Windows\CSC\v2.0.6\namespace\<servername>\users\<username> so we could easily recover all files and folders.
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Commented:
Thanks, that answers the question.  I kind-of figured server wins when you fire up offline files again.

I took a copy of the files but I will also copy the files from the csc folder.