Most RecentNewest TopicsMost LikesMost ViewedExchange Online EWS application stopped working? Do this. This blog post contains exact steps to temporarily unblock your blocked EWS applications (until April 2027). Sending From Email Aliases – General Availability We are announcing General Availability (GA) of Sending from Email Alias in Exchange Online. 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. EWS Deprecation Is Here – What This Means To You EWS deprecation in Exchange Online is starting today. Learn the details of what happens next. The Change Optics Report is now Generally Available in Exchange Online We are announcing General Availability of the Change Optics Report in Exchange Online. Notes from the field: testing EWSAllowedAppIDs safely We wanted to share some tips on how to test EWSAllowedAppIDs (EWS AppID allow list). 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. Exchange Online EWS, Your Time is Almost Up We wanted to provide an update on Exchange Online EWS deprecation. 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. Introducing EWSAllowedAppIDs: Preparing for the Final Phase of EWS Retirement We wanted to share details about the EWSAllowedAppIDs, to help you manage retirement of EWS applications in Exchange Online.
