KB ID 0000453
Problem
Exchange 2010 installs with it’s own (self signed) certificate. To stay free of security errors and warnings, the best bet is to purchase a “publicly signed” digital certificate and use that.
The following process uses the Exchange Management console to create a CSR (Certificate Signing Request). Then what to do with the certificate, when it has been sent back to you.
Solution
Certificate Vendors
Buy Your Exchange Certificates Here!
Related Articles, References, Credits, or External Links
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