[MassDeduction]

I purchased a Lumia 950 XL from the Microsoft Store, and Excel worked fine. I have an Office 365 Home subscription and it worked great. It came with the stock build of W10M. I just upgraded to .107 via the Windows Insider app, and now Excel complains that I need to have an Office 365 subscription to use it. I do have a subscription using the Microsoft Account I'm signed into the phone with, and it worked with the original build. Any ideas?

[hardywang]

I heard other people have the issue, sign out from Excel/Word on phone and sign back in again to fix the problem.

Maybe I am wrong.

[andrew-in-woking]

Sign out of the office apps and sign in again.

[midnightfrolic]

Sign out then back into your MSA in the MS Office apps?
When you launch the Excel app on your Windows 10 Mobile, tap the upper right corner. It should bring you to the accounts sign in/out page. Sign Out. Then sign back in again. Let us know how it goes.

[MassDeduction]

That did it. Thanks! I didn't even know you could log in and out from the apps, I thought it was tied to the Microsoft Account in the system.