Airport Utility, Airport Extreme and Time Capsule

We've seen a number of reports like this over the past week. In most cases, it is an issue with Apple's Back to My Mac (BTMM) servers messing up Apple IDs. Did you set up BTMM on your AirPort routers?

We assume that you have power cycled your entire network.....all devices....correct?

What other troubleshooting steps have you performed?

Same problem since upgrading to 10.12.1 Sierra. Airport is working for wifi connectivity; however, can't find it in TimeMachine or Airport Utility., power cycled several times. Do not have Back to My Mac enabled anywhere. Did not 'Forget Device' yet, as that will probably break my network. Airport with 3TB HDD about 2-3 years old. Can't reach it to get exact info....

New "upgrade" to Sierra 10.12.2 available today is supposed to fix some bugs. I'm not brave enough to run Sierra, so can't help on that.

Best to start a new thread with Sierra in the title to attract views from the Sierra experts.

Turns out I did have BTMM set on Airport, turned off and things are fine now.

Thanks