So, a three datacenter solution is a supported solution, but getting the 
network right is very tricky. Since it’s a short-time solution for you, I 
probably wouldn’t worry about that too much. Simply make the move with alacrity.

From: [email protected] [mailto:[email protected]] On 
Behalf Of Beahm, Keith
Sent: Friday, September 25, 2015 8:29 AM
To: [email protected]
Subject: [Exchange] Datacenter Relocation

We currently have two primary datacenters with a DAG that spans both networks 
(Same AD Forest and Domain), and all was just fine until one of the hosted 
datacenters decided to discontinue that service.  Now we are building out at a 
new datacenter (all three are within 12ms of each other).  I have not read 
about any examples of three site E2010 DAGs, and I was curious if that was 
supported?  It seems like that would be the least trouble to just add the 
addition nodes at the new data center (always under 16 total nodes), seed the 
DB copies, activate the new DB copies,  and the decom the 'old' DB copies and 
nodes.  Alternatively I suppose I could build out a new DAG split between the 
two keeper datacenters, and move the mailboxes between DAGs?  Any suggestions 
or comments would be very welcome.  Thank you for your time and trouble in 
advance.

Keith D. Beahm | Messaging and Storage Architect | Stinson Leonard Street LLP
1201 Walnut Street, Suite 2900 | Kansas City, MO 64106-2150
T: 816.691.3374 | M: 816.808.8983 | F: 816.412.1022
[email protected]<mailto:[email protected]> | 
www.stinson.com<http://www.stinson.com>

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