DR site resiliency design with Exchange 2010 - shared or different namespace for cas.

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kcrxs30

We are creating a DR site at remote location (active/passive model). This will be a passive site (passive databases with stretched DAG) only to be used in case of disaster for complete site failover. I am wondering if we should go with shared/same namespace (mail.company.com) or separate/different namespace (dr.company.com) for DR site? It seems from Microsoft best practices, they advise separate namespace but no clear documentation and steps guide with it. How will failover affect the exchange services (outlook, owa, eas, outlook anyware, ActiveSync., autodiscover, cas array). Any advice/comments/experience are appreciated.

kc
 
N

Neil Hobson

I just responded to this then my browser hung (again!) so hopefully you won't see a double post. Can't remember exactly what I typed but the gist of it was that you'll get many different viewpoints but what I like about different namespaces is that you can test OWA/EAS/etc via a different URL (dr.company.com/owa) without affecting the production service, as long as you've got a 'test' database failed over to the DR site (or you test a specific production database)

With datacenter switchovers you basically change the external DNS records to point to the new DR site. Check out the link below and post back with any specific questions...

http://technet.microsoft.com/en-us/library/dd351049.aspx

Principal Consultant, Silversands | www.silversands.co.uk | www.msexchange.org/neil_hobson
 
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