Exchange 2016 – renewed default cert and now Outlook is prompting


I renewed a default cert as per standard documentation. Now all Outlooks are prompting with a cert error that points to the new default internal cert.


The renewal turns the cert into the default cert.

1. Get-ExchangeCertificate -Server JEDI | FL
– I scrolled down to get Thumbprint for GoDaddy

2. Enable-ExchangeCertificate -Thumbprint *thumbprint* -Services “IIS,SMTP”
– Thumbprint from Step 1, the services being used
– Overwrite the existing setup