We wanted to provide additional guidance on how admins should use the EWSAllowedAppIDs allow list during EWS deprecation.

Customers still using Exchange 2016 or 2019 should read this update about oldest version of Exchange Server allowed to send email to Exchange Online over the OnPremises connector.

We wanted to ask how you use Guid, SamAccountName, and DistinguishedName in Exchange Online.

We wanted feedback about Exchange Server on-premises to different online org Free/Busy sharing, after EWS retirement.

We wanted to share some tips on how to test EWSAllowedAppIDs (EWS AppID allow list).

We wanted to show Administrators how recent mailbox quota changes for Microsoft 365 Business suites will apply to their users.

We wanted to discuss why we are somewhat late with releasing Exchange SE CU1.

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

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!