I previously wrote about a problem that you, as an administrator, may run into when using certificates and Outlook. I also revisited the concept of needing to use encryption and the use of public and private keys when sending and receiving email. And I emphasized the need for certificates and Certificate Authorities such as Verisign and Thawte for using trusted certificates.

Continuing the discussion of certificate errors, if you’re using Exchange 2007 server with Outlook 2007 clients you’ll probably run into a situation sooner or later where one or more of you clients gets an error message such as:
“Name on the Security Certificate is Invalid or Does Not Match the Name on the Certificate”.

This can happen if you’ve recently migrated to Exchange 2007 server and one of your clients tries to connect to their mailbox on the server.

To fix this problem one of your options is to create a new website that includes new virtual directories. Once you have created your new website you can then give it an IP address that you will use to identify your Exchange server. Also, make sure you create a new certificate with the corresponding name. The result is your clients will then be able to access this new website using the certificate.

Another area where you may have problems is when you import a certificate into Exchange 2007 and you get certificate errors with Outlook. When you try to import the certificate you may get a security alert popup with the following error message:

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

Continue reading Troubleshooting Certificate Errors in Outlook Clients – Part 2