We have a single exchange box in our topology and I am setting up rpc over http on it. In IIS, the Default Website properties has an ssl certificate but it is incorrectly named; needs to be mail.company.com. My assumption is I need to create a new ssl cert and give it the common name of mail.company.com. My question is, can OWA and RPC over http use two different ssl certs or do they just use the one that is being applied to the Default Website?

They'll use just one cert so make sure it has all the URLs you need.

Hi, My question is, can OWA and RPC over http use two different ssl certs or do they just use the one that is being applied to the Default Website? No, One website can only use one SSL certificate. You need to install/create a new certificate to replace the original one. Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Thanks