We have a client set up on the mail server under a domain and an alias.

 

Example:

 

Main domain: emaildomainA.com

With an alias domain of: emaildomainB.com

 

Unfortunately they let emaildomainA.com expire and have now lost it.

 

Email all still works as they are now emailing out as emaildomainB.com

 

My question is, can I some how without loosing mail, accounts and settings replace the main account domain of emaildomainA.com with emaildomainB.com - This would remove the expired domain and promote the alias to be the main domain and there would no longer be an alias.

 

Does all that make sense :-)