Exchange Online administrators increasingly encounter the frustrating “EWS Request Blocked” error. Unfortunately, this issue often appears without warning and immediately disrupts email access for users relying on older applications. As Microsoft continues strengthening security across Exchange Online and Exchange Web Services, many legacy email clients, third-party applications, and custom integrations face compatibility challenges. Consequently, organizations that have not modernized their email infrastructure frequently experience blocked connections, synchronization failures, or authentication errors. The good news is that most EWS-related issues can be diagnosed and resolved. However, administrators must first understand why… Read More
How to Fix “EWS Request Blocked” Errors in Exchange Online Legacy Mail Clients
