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Exchange 2010 RPC Client Access Service and Multiple Sites

Posted on 2010-08-31
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Last Modified: 2012-05-10
My Setup:

2 AD Sites
3 Domain Controllers 2 in Site 1 and 1 in Site 2
3 Global Catalog Servers 2 in Site 1 and 1 in Site 2
2 Exchange Server with Default Roles installed on each and 1 in each site
I have  DAG setup and functions perfect

What i cannot do is figure out the best method for the rpcclientaccessserver failover...

in my test scenarios i unplugged server 1 and ran the set-mailboxdatabase db01 -rpcclientaccessserver server2

nothing prompts on outlook that was changed and it takes forever even after forcing replication.

i need it to be as quick as possible is there a way i can create a casarray in each site and switch them over that way?
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Question by:mnevoso
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endital1097 earned 500 total points
ID: 33568496
a cas array is associated with an ad site so you would need to create two
then create DNS CNAME records for your cas array name cas1.domain.com and cas2.domain.com (making the TTL value short)
update your databases with the new rpcclientaccessserver values

then when you do your failover you just need to update DNS with the hostname of the other cas server
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Author Comment

by:mnevoso
ID: 33568617
is that a viable solution? wont it still list the failed mailbox/server in the other array?
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LVL 32

Expert Comment

by:endital1097
ID: 33568655
the dag will failover the active database copy to the other site
the issue is that the client access server associated with the database is also down, that is why access is broken
by updating the dns value for the cas array your users will start hitting the second cas server
the second cas server will have the active location of the database and connect

remember, the client is connecting to cas server and the cas server does the ad lookup for the location of the mailbox when the client connects
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Author Comment

by:mnevoso
ID: 33568680
you would reccomend doing that then for a production environment?
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