New MTR devices unable to connect workplace

Hello collective im facing an issue with new Poly devices 

Poly X52 + Poly TC10 + Poly Trio 60

Poly X52 + Poly TC10

Both devices can not connect to M365.

Error message: "Couldn't connect to Workplace Join. try again, or contact your admin."

Firewall settings seems to be ok and devices are on the same VLAN.

What is the workaround for this kind of issue or what should we check first?

Best regards