Exchange 2013 Certificate best practices.

Good day.

1.What is the certificate common name best practice for 2 Exchange 2013 CAS servers  in a high availability environment.

2.Can the same certificate be used on both servers
Leroy LuffHead of IT & DIgitalAsked:
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MASEE Solution Guide - Technical Dept HeadCommented:
1.What is the certificate common name best practice for 2 Exchange 2013 CAS servers  in a high availability environment.
Install certificate in your CAS servers with common name (i.e. and as SANs in your certificate and configure internal and external URL the same.

2.Can the same certificate be used on both servers.
Yes you can export and import to the second server
Some CAs provide duplicate certificates. Please check with your CA whether they provide duplicate certificates or no

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Simon Butler (Sembee)ConsultantCommented:
The second question about the certificate on both servers depends on the SSL vendor. Some of them will not allow you to without buying an additional licence, some want you to create a new request (so the second server has a different serial number) and finally some allow you to just export and import.

For the first question, it depends if you are using a load balancer or not.
I have done SSL certificates in one of two ways usually.

1. Certificate on the load balancer only. That means and on the certificate and the self signed certificates left on the servers themselves. During troubleshooting use the server's real name or localhost, or modify the hosts file so the name on the certificate resolves to the server itself.

2. Same certificate on all three parts (so load balancer and the two (or more) servers.
Each server also has its own name on the certificate. Again that is the purposes of troubleshooting.

That is of course presuming all servers in the same AD site.
Different AD sites will require their own host name on the SSL certificate.

Leroy LuffHead of IT & DIgitalAuthor Commented:
Thank you.

Experts as always.
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