You have a hybrid deployment between a Microsoft Exchange Online tenant and on-premises Exchange Server 2019 organization. The on-premises organization contains several Exchange Server 2019 servers.

You discover that delivery fails for all email messages sent from the on-premises organization to Microsoft 365.

You discover that the certificate for an on-premises Exchange server expired.

You need to resolve the issue as quickly possible. The solution must minimize administrative effort.

What should you do on the on-premises Exchange server?