Multiple updates released including SP3 for Exchange 2010

Service Pack 3 for Exchange 2010

Microsoft has released a number of updates. The big news here is the release of Service Pack 3 for Exchange 2010 with the two following major features:

Coexistence with Exchange 2013
Support for Windows Server 2012

Great new for all of you wanting to implement Exchange 2013 in your existing environments. But coexistence also requires an update of Exchange 2013.  CU1 for Exchange 2013 is scheduled for release in Q1 so it should be released soon. That said, installing Exchange 2013 in a existing Exchange 2010 Service Pack 3 environment WILL work all tough it is not supported. But it enables you to start running tests in your lab and prepare for the release of CU1.

More information on SP3 for Exchange 2010 can be found here.
If you want to go straight to the download you can find it here.

More updates…

But wait, there is more… Microsoft has also released Update Rollup 6 for Exchange Server 2010 SP2 and Update Rollup 10 for Exchange 2007 SP3. Both are considered security releases so they will be available on Windows Update.

More information on these can be found here.
Update Rollup 6 for Exchange Server 2010 SP2 can be found here.
Update Rollup 10 for Exchange 2007 SP3 can be found here.

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Exchange 2010 Client Access behavior in coexistence with Exchange 2003 and 2007

I answered a post on Technet regarding this so I thought I would post it here as well.

There is no possibility to replace a Exchange 2007 CAS server with a Exchange 2010 CAS server. Exchange 2010 CAS does not support rendering mailboxes from legacy versions of Exchange. In the scenarios below I have included both Exchange 2003 and 2007.

For OWA:

  • When the Exchange 2007 mailbox is in the same AD Site as Exchange 2010 CAS, Exchange 2010 CAS will silently redirect the session to the Exchange 2007 CAS.
  • When the Exchange 2007 mailbox is in another Internet facing AD Site, Exchange 2010 CAS will manually redirect the user to the Exchange 2007 CAS.
  • When the Exchange 2007 mailbox is in a non-Internet facing AD site, Exchange 2010 CAS will proxy the connection to the Exchange 2007 CAS.
  • When the server is running Exchange 2003, Exchange 2010 CAS will silently redirect the session to a pre-defined URL.

For ActiveSync:

  • When the Exchange 2007 mailbox is in the same AD Site as Exchange 2010 CAS and the device supports Autodiscover, Exchange 2010 CAS will notify the device to synchronize with Exchange 2007 CAS.
  • When the Exchange 2007 mailbox is in the same AD Site as Exchange 2010 CAS and the device does not support Autodiscover, Exchange 2010 CAS will proxy the connection to Exchange 2007 CAS.
  • When the Exchange 2007 mailbox is in a non-Internet facing AD site, Exchange 2010 CAS will proxy the connection to the Exchange 2007 CAS.
  • When the server is running Exchange 2003, Exchange 2010 CAS will proxy the connection.

For Outlook Anywhere:

When migrating Outlook Anywhere you move the Outlook Anywhere endpoint from the Exchange Exchange 2007 CAS to the Exchange 2010 CAS. Exchange 2010 CAS will then proxy the Outlook MAPI RPC to either the Exchange 2007 Mailbox server or the Exchange 2010 Mailbox server depending on the mailbox home server.

So in all scenarios for OWA and Activesync you would still need the Exchange 2007 CAS to handle requests for Exchange 2007 mailboxes. Thanks for reading and as usual, please let me know if you have any further questions!