A Microsoft file hosting and synchronization service.
I have the same issue for 20 days : unable to access important files in my personal vault. And paying for this service ! I opened a ticket with Ms support : they requested to do several things that did not work : dissociated account, /reset.... I did it, gathered the error message in a pdf file, said it was not working. So they just closed my ticket !
I have the same issue on a very new pc configured wth my account and as well on my android phone, so issue is no linked to my devices. I see more and more users with the same issue. Linked to Crowdstrike issue ???