Exchange 2010
You stupid fool.
What are you doing still using Exchange 2010?!
Anyways, here's how you replace the certificate...
Replace a certificate for Exchange 2010
- Open Microsoft Exchange 2010 Console
- Browse Server configuration > click on a database
- Find your certificate that's expiring and click on it
- Right-click Import Exchange Certificate...
- Import your .pfx file with the relevant password
- Click next, next > finish
- Right-click Assign Services to Certificate...
- Assign the same services as before, usually
IMAP, POP, SMTP, IIS