Adding an additional Subject Alternative Name to Exchange 2010 and 2003 UCC cert

We have Exchange 2010 and 2003 running in co-existence mode
All roles- CAS, MB, Transport are installed on the same exchange 2010.
We need to add an additional cert, actually replace existing UCC cert with the new one including additional SA name to both servers.
What is the proper way to do it?
for example, do we need to create a new CSR ?


Thanks
Vasilax50Asked:
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Simon Butler (Sembee)Connect With a Mentor ConsultantCommented:
New CSR on the Exchange 2010 server, use the wizard in Exchange to generate it. You don't need the root domain on the certificate.
Once you have done the request and completed, it export the certificate through Exchange, including the private key, then import it in to Exchange 2003 through the SSL wizard in IIS manager. Run IISRESET on Exchange 2003 for the certificate to take effect.

Simon.
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AmitIT ArchitectCommented:
Yes, create new CSR, get the new cert and install it. Then assign the service to new cert.
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