Hi
It just happened to me with a T300.
It was first connected, provisionned then unplugged and moved, mounted to a distant hard to access place.
And now just showing "configure.me" SSID.
Is there a special procedure to ensure the provisionning is saved somehow?
You do need to "test" it after provisioning it via ethernet. I suggest that to plug it in, get it joined. Update all the firmware, wait 10 minutes after a reboot and then disconnect the ethernet and plug in the WAP with a power supply and then check the dashboard to see if the WAP is working via mesh. THEN move it to the final location.
I did exactly that. Except the reboot. This one happened while moving away from the switch to the wall !
It got configured and was working in mesh (AIR led on). Only powered (POE but without any LAN connected) with a POE adapter.
That's why I suppose there is a "save the settings" somewhere in the console which was not checked... 😞
I've never done mesh with a PoE injector.... I wonder if the WAP is confused and doesn't switch to mesh. I've always done local power adaptor. That's a good test for me to try. Do you have a power adaptor?