Exchange Online

Find articles about configuring and administering Exchange Online for Microsoft 365.

Latest Articles

Microsoft Takes Steps to Offset Midnight Blizzard Damage

The fallout from the Midnight Blizzard attack against Microsoft continues as Microsoft takes action to harden the security of its own and customer tenants. One step is to retire the EWS Application Impersonation role. This will happen in February 2025 ahead of the retirement of Exchange Web Services in October 2026.

March 11, 2024

Stopping Spam Sent from Bad Microsoft 365 Domains

Anecdotal evidence is that some spam originates from onmicrosoft.com domains. These are the domains used by Microsoft 365 tenants and the spam indicates that attackers sign up for 'disposable' tenants to send their malware. This article describes what onmicrosoft.com domains are and how to use a mail flow rule to control their traffic.

February 26, 2024

Microsoft Releases Public Preview of Microsoft 365 Backup

If you’re interested in protecting your SharePoint Online, OneDrive for Business, or Exchange Online data, it is useful to understand how Microsoft 365 Backup works and what the software can and cannot do. In this article, Paul Robichaux walks through how to set up and test the preview version of Microsoft 365 Backup.

February 20, 2024

Creating an Exchange Online Inbound Email Traffic Report for the Last 90 Days

Exchange Online keeps message trace data online for 10 days. If you want an email traffic report covering longer periods, you need to retrieve historical message data (for up to 90 days) and report that data. That's the easy description. This article explains some of the complexities involved in generating a 90-day email traffic report for a Microsoft 365 tenant.

November 28, 2023