Hi,

In my environment we have Exchange 2010 running with 8 servers which is holding 3 mailboxes and rest is HUB /CAS. E2k10 is configured in such a way that users from two different region using two different URLs mail.abc.com & yurmail.abc.com.

I want to consolidate to one URL as mailboxes are 5000 + users, I have F5 load balancer in place, anyone please suggest how to achieve this.

I don't want to disturb any setting at client end and autodiscover, activesync and other things should work.

With Exchange 2010, this isn't practical with mailboxes in two different sites.  So I'd suggest that your first step would be to upgrade to Exchange 2013, or consolidate all Exchange 2010 mailboxes in one site.

Hi Amit,

Thank you for your question.

By my understanding, it is referred to redirection on Exchange 2010 in two AD sites, as you said, we could use the parameter of Silent. For example, we could use the following command to configure OWA cross-site redirection by Silent:

Set-OWAVirtualDirectory -Identity "Contoso\owa (Default Web site)" -CrossSiteRedirectType Silent

The more details could be referred to the following link:

https://technet.microsoft.com/en-us/library/bb310763(v=exchg.141).aspx

If there are any questions regarding this issue, please be free to let me know. 

Best Regard,

Jim

But redirection means that the URL is still there, users are just silently redirected to the other URL.  I didn't discuss that because it wasn't what you asked for.