Need help in Exchange Server 2010 Deployment and Configuration for Multi-site & Multi DAG environment.

Current setup is as mention below;

Exchange 2010 (both ent+std) installed on 5 different location and in active directory we have 3 sites A, B, C ( remaining 2 sites pending)

Site A is HO office and Site B will be DR of it and having separate DAG A (3 Mbx srv - 2 Mbx are in Site A and 1 Mbx in Site B but not installed pending)

Site B is DR site for all sites but as of now all 30 databases are active from it.

Site C is Prd site but as of now its passive node and site A and B are part of same DAG B (4 MBX srv - 2 mbx in site B and 2 mbx in site C).

Currently All DNS record are pointing to Site B in DNS like OWA etc.

CAS Array details of 3 sites:
Site A = sitea.xyz.com ( In site A windows NLB is used)
Site B = siteb.xyz.com ( In site A hardware load balancer is used)
Site C = sitec.xyz.com ( In site A hardware load balancer is used)

My Concerns are;

1. We have to move all mailbox database from Site B to Site C. what are think i have to ensure to get it done without any issues? Also ensure all CAS Exchange web services (like free\busy etc) work properly?
2. We have to use single url (mail.xyz.com) for OWA\active sync to access for each site (internally)?
3. We have Vasco integrated for external authentication so how we configure OWA url for that? 

4. Also let me know the impact of all while performing above changes?

August 26th, 2015 4:59am

1.  You must ensure that DNS points the URLs to site C.  There is always some latency, so be sure your TTLs are set low, say 15 minutes or even less, well in advance ofthe switch.

2.  Is that a question?  If it is, the answer is no.  However if you use different URLs for the sites, you may need to change the databases' RPCClientAccessServer property to the correct URL.

3.  I have no idea what that is.

4.  The database switchover shouldn't take but a few seconds.  The DNS switch will leave clients unable to connect for up to the TTL duration.  If you don't plan and execute this properly, the outage could be even longer.

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August 26th, 2015 12:31pm

Hi Thanks for response,

1. Please can you share the process for configuring CAS server in DR site in DAG case.

2. Also please share the step how change and view the "RPCClientAccessServer"

3.  I have 4 DAG created in exchange 2010. Site B is DR for all sites (A,C,D,E) so i can use same 2 CAS server for other 3 DAGs.

CAS Array details of 3 sites:

Site A = sitea.xyz.com ( In site A windows NLB is used)
Site B = siteb.xyz.com ( In site A hardware load balancer is used)
Site C = sitec.xyz.com ( In site A hardware load balancer is used)

My requirement is,

We want local mailbox servers in each site also we have to achieve HA. I have 5 different sites.

August 27th, 2015 9:18am

Sharing this link for Ed :)

http://tinyurl.com/qd6avha

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September 1st, 2015 1:49pm

Thanks for that!  I've been lamenting the loss of lmbtfy.com, since Bing is my preferred search engine.

September 1st, 2015 9:58pm

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