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Dead links in offline files

I have come into some offline files synchronization issue when workin with offline files. Users have had offline files enabled on their network drive. And then as the use of this drive became useless, everyone disconnected this drive from their security context. Now users get an error from Syncronisation every time they log on or off saying it was not able to syncronise with these shares. I have tried to remove the links to these dead shares but I cannot do it in Explorer>Tools>Synchronise. the dead link would show up in the list, but unchecking it was not enough as it would come back checked at next reboot.

I assumed some Client side Caching corruption. The Offline Files (CSC or Client Side Caching) cache and database has a built-in capability to restart. Which led me to the MS kb230738 and gives you some registry tricks.

1. Add the following registry entry using your prefered method...
   "HKLM\Software\Microsoft\Windows\CurrentVersion\NetCache\FormatDatabase", 1, "REG_DWORD"
2. Restart the computer

What this does is wipe out orphaned user synchronization information in sysvol. I just would like to emphasize a warning: All cache files are deleted and unsynchronized data is lost.