I have downloaded to certificate in verisign.com for the installation of communication server 2007 because it is needed to start the service.
The certificate is not working it says "it's already been used blah blah blah.."
I've been looking for a free certificate but most of them needs some payment.
I am using a trial version of communication server for research purposes only. Where can I get a valid FREE certificate to complete the installation?
Please help me.
You should install Microsoft Certificate Services as an Enterprise Root Authority.
And request your certificates from your internal CA
Your clients must import the root CA Certificate into their computers, if they are joined to AD this is an automatic process