This relates to
but no body knows what I am talking about.
Apparently the autodiscover service is still pointing at mail.abccom.com and i need to change it to point to mail.abclimited.com.
I have already opened up a support ticket with domain hosting company to update the records at their end to point to mail.abclimited.com but there are some questions:
1 - is that the only thing that needs doing
2. do i need to do anything on the server to update autodiscover records etc
3. or should i just buy another 5 SAN UCC certificate for old domain and the error will stop popping up.