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Exchange 2010 edge transport or ISA 2006 ?

Posted on 2009-12-21
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Currently we have an ISA 2006 nlb cluster in a DMZ that forwards client requests to an Exchange 2003 OWA nlb cluster which then forwards to an Exchange 2003 active\passive cluster:

Remote client--> ISA 2006 nlb---> OWA nlb--> Exchange backend

In transitioning to exchange 2010, should we publish the Ex2010 CAS nlb array in ISA (as we did for the exchange 2003 OWA nlb) OR replace the ISA servers with Edge transport servers nlb ? Any related web links would be appreciated.
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Question by:anarine
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by:MinoDC
ID: 26095078
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by:anarine
ID: 26095246
Ok but it does not explain whether I should go with ISA 2006 vs Exchange 2010 Edge Transport.
From what I've read, the Edge Transport role is placed in the DMZ as a standalone machine (just like my ISA server at present , and like ISA, the edge transport servers can also be in a NLB cluster. So I am thinking should I replace ISA with Edge transport servers ? Is it a best practice, or recommended ?
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anarine earned 0 total points
ID: 26167786
I beleive i will leave the isa server, and the edge server role would only be beneficial if i
am to use the antispam features it provides.
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