Are you thinking of giving away your old Xbox One and replacing it with a new Xbox Series S or Xbox Series X after you get one instead of a PlayStation 5? Or maybe you want to upgrade from your Xbox Series S to an Xbox Series X? Or maybe you want to jump ship and buy a PlayStation 5 after seeing yet another game miss the Xbox at launch after last year's fiasco with Baldur's Gate 3 (or you saw just how much effort Sony puts into marketing its first-party exclusives)?
Regardless of why you will let go of your Xbox, you'll probably want to factory reset your console first to protect your valuable data and yourself from possible fraud. But before you reset your Xbox, you might want to wait until Microsoft issues a fix.
If you head over to the Microsoft Online support forum, you'll find dozens of posts of Xbox owners asking for help because they can no longer play online after updating their console last August.
According to the replies on this Reddit thread, this is a more prevalent issue than expected, and Microsoft has only become aware of it. It's not bricking Xbox consoles permanently (at least, not yet) but the inability to play online does affect how much you can enjoy your Xbox considering how popular online multiplayer games are these days.
