Skype for Business (Android) Expired Certificate Installation?!?!?

[LegacyPulsar]

Hi everyone,

 

I have an issue in Skype for Business - seemingly only on Android - where the following pops up when staff install and sign in.

 

 

We're not even part of Tavistock College or their MAT, so I'm not sure what the hell is going on here. Closing and reopening the app a few times, signing in from scratch each time, eventually makes this disappear, but I have no clue why it is even appearing in the first place!

 

Anyone else come across anything similar?

 

We will roll out Teams in the very near future which will render this all null and void, but this is just so people can keep in touch and discuss school business via video conferencing without having to use another third-party piece of software such as WhatsApp, Zoom etc. in the meantime.

[p858snake]

Is it all staff? only some? only a single staff member?

[ZeroHour]

Double check all your dns/cname records you have and make sure they match what o365 wants them to be.