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Exchange 2010 Cert with multiple CAS

We are migrating from a one CAS Exchange 2007 environment to a Exch 2010 with multiple CAS servers with Load Balancing. Will I need a SAN cert for each of the new CAS servers?  We use EAS on the 2007 CAS. Will I need a new cert there for the legacy EAS connection when EAS cimes through the new CAS 2010? We want to keep the same EAS domain name so as not to force users to change on their mobile devices. Can the new legacy cert on the 2007 CAS be from an internal CA?  Sorry for all these questions at once but they are all related.
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Wildgen
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Wildgen
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BusbarSolutions ArchitectCommented:
Yes if you are doing proxing
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WildgenAuthor Commented:
I'm assuming this is the answer to the last question. We can use a internal CA for the Legacy EAS on the old 2007 CAS if we proxy from the new CAS. Thanks

 Do I need a new SAN cert for each of the new CAS 2010 servers if they are Load Balanced?
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BusbarSolutions ArchitectCommented:
you can use single SAN and install it on all of the servers
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WildgenAuthor Commented:
I assume this single SAN will need to include a domain name for each of the CAS servers.
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Satya PathakLead Technical ConsultantCommented:
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BusbarSolutions ArchitectCommented:
Yes it will include server names and netbios names if needed
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