Detection rule for Office 365

Hi

I'm about to create a application for Office 365 in Configuration Manager 2012 R2.

I've seen recommendation to look for %programfiles%\Microsoft Office 15\root\Office15. But will that not break when office is upgraded on the client?

In registry I've HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\O365ProPlusRetail - en-us. And for the looks of it I cannot use this if a user decides to download and install a different version than en-us.

Any idea on what detection rule I should use for Office 365 that works for next versions of Office 365 (office 2015)?