Join us June 17–18 for a deep dive into Copilot Control System—live expert-led sessions and Q&A on data security, agent lifecycle, adoption, and more! Learn more >
Most RecentMost ViewedMost LikesTLS Certificates in Exchange Hybrid - Common Issues & How to Fix them This blog post will help you understand the role of TLS certificates in Exchange hybrid. Block BCC Messages to Distribution Groups in Exchange Online Email distribution groups (DGs) are great for easily sharing information or engaging in discussions with a large group of people. But what if someone BCCs a DG? Introducing Exchange Online Tenant Outbound Email Limits We’re introducing new tenant-level outbound email limits (also known as the Tenant External Recipient Rate Limit or TERRL). Exchange Online to retire Basic auth for Client Submission (SMTP AUTH) Today, we are announcing that Exchange Online will permanently remove support for Basic authentication with Client Submission (SMTP AUTH) starting March 2026. Public Preview: High Volume Email for Microsoft 365 Today we’re thrilled to announce the public preview of High Volume Email (HVE) for Microsoft 365. Throttling and Blocking Email from Persistently Vulnerable Exchange Servers to Exchange Online As we continue to enhance the security of our cloud, we are going to address the problem of email sent to Exchange Online from unsupported and unpatched Exchange servers. Introducing more control over Direct Send in Exchange Online Read about a new feature that gives you more control over Direct Send in Exchange Online. Directory Based Edge Blocking Now Available for Public Folders & Dynamic Distribution Groups Announcing the availability of Directory-Based Edge Blocking feature for mail enabled public folders (MEPF) and dynamic distribution groups (DDG). Updates to High Volume Email (HVE) Public Preview We are excited to share some updates to High Volume Email (HVE) Public Preview. Announcing General Availability (GA) of the New Message Trace in Exchange Online We are excited to announce the GA of the new Message Trace in the Exchange admin center (EAC) in Exchange Online.
