One SSL Cert on Two Exchange Servers

I have purchase one SSL "Not Wild Card" and applied them to both Exchange Servers is a DAG Cluster. When I connect Outlook to one Exchange server I do not get any SSL Cert errors.

When I connect to the other Exchange server I get the following Error.

The name on the security certificate is invalid or does not match the name of the site.

Do you want to proceed.

Do I need to purchase Separate certificates for each Exchange Server?

Thanks.
fly4fundyAsked:
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Skiff_RatCommented:
This can be a number of different issues.  What version of exchange are you running for this?  and for your SSL cert do you have a UCC cert or a single domain cert?
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Adam BrownSr Solutions ArchitectCommented:
If you are accessing the servers using different names, you would either need a separate cert for each server or a single cert that has multiple host names listed (Subject Alternate Names, or SAN)
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TG TranIT guyCommented:
What you need is a SAN cert with URL/FQDN of both servers.  Since you mentioned DAG, you must be running Exchange 2010.  In this case, the cert should be on CAS instead
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fly4fundyAuthor Commented:
The server is Exchange 2010 and the certificate is a single domain cert named webmail.hsag.com. Each server is a CAS Server.

Do I have to get a Certificate named somethingelse.hsag.com

Thank. you.
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Adam BrownSr Solutions ArchitectCommented:
Unless you have load balancing enabled and webmail.hsag.com points to the Virtual IP Address of the Load Balancer Virtual IP, yes, you would need an additional certificate for the other server or a certificate that has both hostnames imported on both computers.
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fly4fundyAuthor Commented:
Nope no load balancer to speak of.

Thank you.
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