I have not had much luck with Black Ops 3 since it launched, random glitches with the game not saving, getting booted from the network, etc, etc. However this latest problem had me stumped for a while. The Black Ops server is not available at this time. Please try again later Error Code A.B.C-.-F.G.H.I.J.K.-.-N-.-Q.-.S.-.U.-.W.X.Y.Z. How to fix this error: Go to settings on Xbox One Go to network settings Select advanced Clear alternate MAC address This should fix the issue and allow you back online!
Had that error a couple of times, was wondering what I could do to remedy the issue, so thanks for the advice it help me greatly.