Overwatch BC-124 is a login error many Xbox One players have likely faced when trying to play the game. Here is how to avoid this problem.
@BlizzardCS I’m getting the BC-124 problem authenticating Xbox Live error when trying to log in to Overwatch. Is it under maintenance atm?— Jack (@j4ckwalsh) May 8, 2018
Overwatch BC-124 Error: How to fix
The BC-124 error typically happens right after a new update is released for Overwatch or the console itself. The Overwatch servers require you to have the most up to date version of the game or Xbox system to play and will not authenticate you otherwise. BC-124 could also be caused my connection issues
There are a couple ways to fix the problem. One could just reset their Xbox and put it on standby while waiting for the console to update itself.
The BC-124 error may pop up not only when the server refuses to authenticate a player, but also when there is a general server outage. Look to see if there is a server outage before contacting Blizzard Support.