Most RecentNewest TopicsMost LikesMost ViewedSending From Email Aliases – General Availability We are announcing General Availability (GA) of Sending from Email Alias in Exchange Online. Released: September 2026 V2 Exchange Server Security Updates We have released a V2 of September 2026 Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only. EWS Deprecation Is Here – What This Means To You EWS deprecation in Exchange Online is starting today. Learn the details of what happens next. Exchange Server AD FS Modern Authentication: Expanded Outlook client support Expanded Outlook client support for Exchange Server AD FS Modern Authentication is here! Take control of your EWSAllowedAppIDs list before EWS access changes We wanted to provide additional guidance on how admins should use the EWSAllowedAppIDs allow list during EWS deprecation. Help us shape Exchange Server on-premises to different online org Free/Busy after EWS retirement We wanted feedback about Exchange Server on-premises to different online org Free/Busy sharing, after EWS retirement. Notes from the field: testing EWSAllowedAppIDs safely We wanted to share some tips on how to test EWSAllowedAppIDs (EWS AppID allow list). Released: August 2026 Exchange Server Security Updates We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only. Cross-tenant Free/Busy, MailTips, and Calendar Sharing are moving to Cross-Tenant Access Policy 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: Now Generally Available Writeback for cloud-managed remote mailboxes is now Generally Available!
