We've got a client who changed its Company Name just after the migration of 2010 => 2013.
All mailboxes are moved to 2013.  Now we need to change their external/internal urls without user interruption...

Current config:

    2 x Windows 2012 R2 + Exchange 2013 RU7 => 1 DAG => 2 databases (primary & archive)

External urls:
activesync.currentcompany.be
autodiscover.currentcompany.be

Internal urls:
Exchange2013.currentcompany.be

DNS records:
autodiscover SRV record for newcompanyname.be

Accounts:
Login@newcompanyname.be

New config:

Same servers

External urls:
activesync.newcompanyname.be
Internal urls:
exchange2013.newcompanyname.be

What is the best practice for this?

If those new DNS entries (activesync, autodiscover) are present, you should be able to switch painlessly by altering their (primary) e-mail address (@newco.be). You can let autodiscover handle the switch in endpoint FQDN (urls), however that process is device dependent. Manually configured clients might need some (manual) work. Also, don't forget to change/put in the necessary MX records.

Hi,

If the domain name is changed, please check the email address policy for all domain users. If all users are using the new domain, the old domain would never be used and all DNS records have been changed to new domain, we can run the following commands to change the URLs:

Set-ClientAccessServer -Identity CAS2013 -AutodiscoverServiceInternalUri https://exchange2013.newcompanyname.be/autodiscover/autodiscover.xml

Set-WebServicesVirtualDirectory -Identity "CAS2013\EWS (Default Web Site)" -InternalUrl https://exchange2013.newcompanyname.be/ews/exchange.asmx -ExternalUrl https://activesync.newcompanyname.be/ews/exchange.asmx

Set-OABVirtualDirectory -Identity "CAS2013\oab (Default Web Site)" -InternalUrl https://exchange2013.newcompanyname.be/oab -ExternalUrl https://activesync.newcompanyname.be/oab

Set-OwaVirtualDirectory -Identity "CAS2013\OWA (Default Web Site)" -ExternalUrl https://activesync.newcompanyname.be/owa -InternalUrl https://exchange2013.newcompanyname.be/owa

Set-EcpVirtualDirectory -Identity "CAS2013\ecp (Default Web Site)" -ExternalUrl https://activesync.newcompanyname.be/ecp -InternalUrl https://exchange2013.newcompanyname.be/ecp

Set-ActiveSyncVirtualDirectory -Identity CAS2013\Microsoft-Server-ActiveSync (Default Web Site) -ExternalUrl https://activesync.newcompanyname.be/Microsoft-Server-ActiveSync

 -InternalUrl https://exchange2013.newcompanyname.be/Microsoft-Server-ActiveSync

Additionally, please create a new trusted certificate with the following namespaces:

activesync.newcompanyname.beautodiscover.newcompanyname.beExchange2013.newcompanyname.be

Assign the certificate with IIS service.

Regards,