troubleshooting Question

Exchange 2003 and 2010 co existence and certificate help needed

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wpstechFlag for United States of America asked on
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I need some clarification on the names needed for the UCC/SAN certificate for an Exchange 2010 transition.  I have the following: 1 front end Ex2003, 1 back end Ex2003, 2 new Ex 2010 with CAS, HT and Mailbox on both boxes.  These boxes will have a CAS array w/ no load balancing and they will have DAG.

What names will the new cert need?  if it needs the name, do i physically need to change the 2003 server names to legacy?  if so, which one front end or back end?  when i create the cert request, which new Ex2010 box do i do it from?  does this cert need fqdn's of both new servers?  do i need to create a new certificate for the legacy box that changes its name to legacy?  I need a lot of clarification on all of this naming convention changes and the naming needed for the certificate(s).  thanks in advance

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