Maybe you can find some problems adding the SRV records for Office 365.

The matter as you can see is the cPanel lack of a field to indicate the protocol,

 

so the solution is to append to the TYPE field the protocol itself.

 

 
the format is:

<service>.<protocol>

currently:

_sip._tls

_sipfederationtls._tcp

don’t forget to add the period between service and protocol.