Com.microsoft.office.licensing.plist May 2026

This .plist was born around 2008, during the Mac Office 2008 era. Back then, licensing was a simple affair: you typed a 25-character product key, and Microsoft scrambled it, stored it in this file, and checked it when Word or Excel launched. But the real oddity is the .

If a standard (non-admin) user’s licensing plist corrupts, they can’t delete it themselves. They can’t even read it. An admin must remotely push a script to remove the file, then have the user re-activate. Contrast this with Adobe Creative Cloud, which stores licensing tokens in the user’s Keychain—independently manageable by each user. com.microsoft.office.licensing.plist

As long as enterprise customers cling to perpetual licenses (pay once, own forever), com.microsoft.office.licensing.plist will haunt /Library/Preferences/ . It’s a zombie file—undead, inconvenient, and utterly fascinating. If a standard (non-admin) user’s licensing plist corrupts,