Most RecentNewest TopicsMost LikesMost ViewedTake 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. Exchange 2016/2019: Throttling and Blocking up to the Final Public Update Baseline 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. Tell us how you use ObjectGuid, SamAccountName, and DistinguishedName in Exchange Online We wanted to ask how you use Guid, SamAccountName, and DistinguishedName 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). Understanding the new 100 GB mailbox entitlement for Microsoft 365 Business suites We wanted to show Administrators how recent mailbox quota changes for Microsoft 365 Business suites will apply to their users. 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! Cross-Tenant Message Recall in Exchange Online We wanted to announce cross-tenant Message Recall in Exchange Online! 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. How to determine which Resource Mailboxes are being actively used Here are some tips on how to learn more about Exchange Online resource mailbox use.