A Microsoft file hosting and synchronization service.
If this is the solution, I wonder why someone from the Microsoft Team told me it was a bug that they are working on.
Also, instead of saying 'include accounts based....' it says on my pc 'show files from office.com' But I use the paid version of Microsoft 365 and I have never used the online office.com. I daren't uncheck it because it seems all my Word files are showing in the office.com version on the cloud, even though they are synched to the paid Microsoft 365 on my PC.
I'm totally confused.