We are getting an error in out logs saying
"The STARTTLS certificate will expire soon: subject: [server].[domain] thumbprint: [thumbprint], hours remaining: 1726. Run the New-ExchangeCertificate cmdlet to create a new certificate."
Most posts I see on this subject talk about creating a new self-signed certificate, but the thing is that the certificate it is currently using (the one to expire in 1726 hours) is not a self-signed certificate. It is a public certificate which until recently was also used for the IIS, SMTP, POP and IMAP services. We have since had a new certificate issued and moved all those services (IIS, SMTP, POP & IMAP) to it, but STARTTLS is seemingly still tied to the old certificate. How can I set STARTTLS to use the new certificate?