We wanted to provide information related to migration of existing Exchange Online Organization Relationships to the new sharing model.

Writeback for cloud-managed remote mailboxes is now Generally Available!

We wanted to provide a reminder that Exchange 2016 and 2019 ESU program ends in October 2026.

We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only.

We wanted to announce cross-tenant Message Recall in Exchange Online!

We wanted to tell you that we will be retiring OWA Light in Exchange Server.

We wanted to share details about the EWSAllowedAppIDs, to help you manage retirement of EWS applications in Exchange Online.

We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only.

Here are some tips on how to learn more about Exchange Online resource mailbox use.

How to go about replacing IIS SMTP virtual server with Exchange Edge Transport.