If your Office 365 software (Office 2016 SKU) is stuck on a certain version number and are experiencing an issue where Office 365 doesn’t update or won’t update – like mine was (on two machines), I managed to find a fix. Bearing in mind, this even happened on a brand new machine, an install of Office 365 (Office 2016), the wrong URL was set in the registry to grab updates.

Go to the registry (only if you have the Office 2016 version of Office 365) and change the value of HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun\Configuration\CDNBaseUrl to http://officecdn.microsoft.com/pr/492350f6-3a01-4f97-b9c0-c7c6ddf67d60

Just in case, back this value up first.

Then go back in and try to update. From within Office, go to File > Account >Update Options > Update Now http://screencast.com/t/l2MB1bdMw

For your reference, this is the location that I had originally http://officecdn.microsoft.com/pr/b8f9b850-328d-4355-9145-c59439a0c4cf  

This is the version number I had prior: