Today I had a user as me how she could disable the Office 365 upgrade notification. She is currently on Office 2013 and cannot upgrade right now to Office 2016 due to some compatibility issues with other apps. Of course Microsoft doesn’t make this easy, but I did find a way.
- Open the registry (in the bottom left type regedit.exe and press enter or ok)
- Go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\15.0\ClickToRun\Updates
- Type in a new value for “UpgradeAdvertised” to 0 (just double click it and type 0)
This is currently working for us.