Is it possible to setup full High Availability with TWO physical Server with minimum cost
Here are the supported load balancers for Exchange 2010: http://technet.microsoft.com/en-us/exchange/gg176682Tim Harrington | MVP: Exchange | MCITP: EMA 2007/2010, MCITP: Lync 2010, MCITP: Server 2008, MCTS: OCS | Blog: http://HowDoUC.blogspot.com | Twitter: @twharrington
December 17th, 2011 1:09am

Option 1 will work if you have a HLB, dont think a switch will do it. Has to be a HLB.Sukh
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December 17th, 2011 4:39am

what will happen in option 1 (typical hub/cas/mbx in each of two physical server), i use hp/cisco switches for NLB? is it possible for me?ErindOsmani
December 24th, 2011 5:23pm

Here are the supported load balancers for Exchange 2010: http://technet.microsoft.com/en-us/exchange/gg176682Tim Harrington | MVP: Exchange | MCITP: EMA 2007/2010, MCITP: Lync 2010, MCITP: Server 2008, MCTS: OCS | Blog: http://HowDoUC.blogspot.com | Twitter: @twharrington
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December 24th, 2011 5:26pm

Scenario: OS - WinServer2008R2 EnterpriseEdtion 2010 what is the best way to achieve full HA 1. By using Typical installation (HUB/CAS/MailBox) on each of physical server. how could be achieved NLB for CAS array and DAG? is it possible without some extra hardware/software??? 2. Using HyperV machines Sever 1 - Guest01 (Hub/CAS) Guest02(Mailbox) Server 2 - Guest03 (Hub/CAS) Guest04(MailBox) how licences i'll need on each of the scenarios? thank youErindOsmani
December 24th, 2011 5:50pm

Option 1 - no, you cannot have 2x hub/cas/MB servers with DAG and NLB configured since windows failover cluster service conflicts with windows network load balancing service. Must use a hardware load balancer in this case (although there are some virtual HLBs available for low costs like from Kemp Technologies). Option 2 - This will work with NLB although NLB is definitetly not preferred over HLB Take a look at these post about using NLB: http://support.microsoft.com/kb/2644137/ http://www.stevieg.org/2010/11/exchange-team-no-longer-recommend-windows-nlb-for-client-access-server-load-balancing/ You will need to license every Exchange server installed. You only need Standard Edition for the HUB and CAS and for the MB role Enterprise gets you support for more that 5 databases. Tim Harrington | MVP: Exchange | MCITP: EMA 2007/2010, MCITP: Lync 2010, MCITP: Server 2008, MCTS: OCS | Blog: http://HowDoUC.blogspot.com | Twitter: @twharrington
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December 24th, 2011 8:45pm

Option 1 will work if you have a HLB, dont think a switch will do it. Has to be a HLB.Sukh
December 24th, 2011 8:56pm

For the license question, please use the contact information in http://www.microsoft.com/licensing/contact-us.aspx which would be the best place for asking the answer.Fiona Liao TechNet Community Support
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December 25th, 2011 4:21am

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