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I think the best way to do this is to use an hardware based load balancer.<br />
<br />
Check this:<br />
<a href="http://www.msexchange.org/articles_tutorials/exchange-server-2010/high-availability-recovery/load-balancing-exchange-2010-client-access-servers-using-hardware-load-balancer-solution-part1.html" rel="ugc">http://www.msexchange.org/articles_tutorials/exchange-server-2010/high-availability-recovery/load-balancing-exchange-2010-client-access-servers-using-hardware-load-balancer-solution-part1.html</a><br />
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You could also use a NLB cluster.<br />
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Next you configure a CAS Array:<br />
<a href="http://blogs.technet.com/b/ucedsg/archive/2009/12/06/how-to-setup-an-exchange-2010-cas-array-to-load-balance-mapi.aspx" rel="ugc">http://blogs.technet.com/b/ucedsg/archive/2009/12/06/how-to-setup-an-exchange-2010-cas-array-to-load-balance-mapi.aspx</a><br />
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I think the best way to do this is to use an hardware based load balancer.

Check this:
http://www.msexchange.org/articles_tutorials/exchange-server-2010/high-availability-recovery/load-balancing-exchange-2010-client-access-servers-using-hardware-load-balancer-solution-part1.html [http://www.msexchange.org/articles_tutorials/exchange-server-2010/high-availability-recovery/load-balancing-exchange-2010-client-access-servers-using-hardware-load-balancer-solution-part1.html]

You could also use a NLB cluster.

Next you configure a CAS Array:
http://blogs.technet.com/b/ucedsg/archive/2009/12/06/how-to-setup-an-exchange-2010-cas-array-to-load-balance-mapi.aspx [http://blogs.technet.com/b/ucedsg/archive/2009/12/06/how-to-setup-an-exchange-2010-cas-array-to-load-balance-mapi.aspx]



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I have Exchange 2010 at my main office and have set up a second Exchange 2010 server at another office to provide DR/BC. &nbsp;I am using Database Availability Groups (DAG) to replicate the databases to the remote site. &nbsp;I know that Outlook 2007/2010 can use the SRV records to find AutoDiscover, and therefore find the secondary server if there is a failure. <br />
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The question is: can I set up automatic failover for Outlook Web App and ActiveSync clients (specifically the iPhone and iPad)? &nbsp;Will OWA and/or ActiveSync clients use AutoDiscover to find the secondary server, or is there something else I need to do to help these clients reconfigure automatically?
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I have Exchange 2010 at my main office and have set up a second Exchange 2010 server at another office to provide DR/BC.  I am using Database Availability Groups (DAG) to replicate the databases to the remote site.  I know that Outlook 2007/2010 can use the SRV records to find AutoDiscover, and therefore find the secondary server if there is a failure. 

The question is: can I set up automatic failover for Outlook Web App and ActiveSync clients (specifically the iPhone and iPad)?  Will OWA and/or ActiveSync clients use AutoDiscover to find the secondary server, or is there something else I need to do to help these clients reconfigure automatically?

Automatic failover for OWA and ActiveSync clients on Exchange 2010

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.

Outlook

iPad is an iOS-based line of tablet computers built around the device's multi-touch screen, including a virtual keyboard. The iPad includes built-in Wi-Fi and cellular connectivity on select models. An iPad can shoot video, take photos, play music, and perform Internet functions such as web-browsing and emailing. Other functions – games, reference, GPS navigation, social networking, etc. – can be enabled by downloading and installing apps.