Force Mailbox or DataStore to use Specified CAS Server

Exchange 2013 CU9

is this possible ? (Force Mailbox or DataStore to use Specified CAS Server)

i'd like for my clients in USA to use a local CAS Server there and not the CAS Server in the UK?

Mailstore is in a DAG config - Store in USA, replicated to UK

Thank you.


  • Edited by mr_burgess Friday, August 21, 2015 5:37 AM spelling error
August 21st, 2015 5:37am

Thanks for the reply.

i am using FQDN for each CAS Server

US - CAS Server mail.xyz.com

UK - CAS Server mail.123.com

AutoDiscoverServiceInternalUri  has been set to represent this on the USA & UK CAS servers?

autodiscoverserviceinternaluri - uk - mail.123.com/autodiscover/autodiscover.xml   DNS points to UK CAS server

autodiscoverserviceinternaluri - usa - mail.xyz.com/autodiscover/autodiscover.xml   DNS points to USA CAS Server

Outlook clients continually go to the UK CAS Server, and never USA CAS Server.

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August 23rd, 2015 11:46pm

Have you considered setting the AutoDiscoverSiteScope parameter in Set-ClientAccessServer for internal clients?  And are you sure that your AD sites are properly configured?

For External clients, Autodiscover will be based on the e-mail address they

August 24th, 2015 2:08am

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