Exchange 2013 Multi Site DAG failover

I am running Exchange 2013 on windows 2012 servers that are split  between two different sites with two DAG members at each site, and one CAS server on each site. These sites are connected using an MPLS network.  

I need to be able to access the Exchange ECP from the secondary site and switchover the databases if the entire connection is severed from the primary site. is the first site and is the second site.  When I attempt to access the ECP from the secondary site using the, I get the login screen but I am then re-directed to when I login, but this connection wont be available when the data line is down.

How can I access the ECP from the secondary site ECP server when needed without getting this re-direction. I will then re-direct my clients through DNS to connect to this CAS on site 2 when needed if the primary location goes down.

Thank you,
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Guy LidbetterCommented:
The reason I'm guessing you are being redirected is that is the site with your local database activated, so that is your nearest CAS box.

In the case that the site is down, there will be no redirection.

If you need to ensure connectivity to the exact CAS box... use the servername instead... i.e.
rpeterslllAuthor Commented:
Ok, would I then need to activate the databases manually on the DAG server on the secondary site first?

 Since I am unable to do this through ECP, I assume my only way of doing this would be to run the command through PowerShell. Once the databases are mounted on the server at the secondary site, I would be able to access the ECP on the secondary site?

Will SzymkowskiSenior Solution ArchitectCommented:
I just answered a question which i provided loads of detail based on how this works. See the PAQ below..

Also as Guy had mentioned, you are getting redirected to the CAS where you mailbox is active. You also need to make sure that you have a mailbox in the Secondary site during the failover because you require a mailbox to login to the EAC.

Also do not get mistaken between High Availability and DR Site failover. These are 2 different concepts and if you are failing over a complete Site then you will also need to use DAC (Datacenter Activation Co-ordination) which is a manual change. The link above describes this.


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