If autodiscover is pointing to Office 365 and you are not managing the users via the on-prem Exchange Server or in Exchange Hybrid mode or relaying SMTP mail to 365, etc..., then you don't need to renew them or use them. 365 will take care of the certificates for you.
Do I still need an SSL certificate on our domain after moving to Microsoft cloud?
Jon Apneseth
1
Reputation point
We have changed to O365 and moved our users to the Microsoft cloud. Our domain is registered with a third party, where we also have purchased a SSL certificate for the website and Exchange server (now retired).
Do we still need to retail these certificates, or is this taken care of by O365?