Offline Files tab missing
I had a problem today... at a customers laptop the Offline Files tab was missing...
The solution vas a registry setting:
Next, navigate to these Registry keys:
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HKEY_Local_MachineSoftwarePoliciesMicrosoftWin dowsNetCache
If the entry for "NoConfigCache" is set to 1 (that's one), it disables the
tab from appearing. Changing it to 0 (zero) should make it appear. Make
sure to save your changes.
I found the solution here after some googling.
Source: