BitTitan incident
Microsoft EWS Access Change – Action Required Soon
BitTitan experienced a notice incident on March 31, 2025 affecting MigrationWiz and MigrationWiz DE, lasting 92d 19h. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- monitoring Mar 31, 2025, 04:36 PM UTC
Microsoft has announced a change to Exchange Web Services (EWS) access in Exchange Online, effective at some point in April 2025 (Microsoft has not provided a specific date for this change). Once this change has been made, EWS access will only be allowed if both the organization-level and user-level EWSEnabled flags are set to True. To avoid any service disruptions, please ensure that EWS is enabled at both levels in your Microsoft 365 tenant. If either flag is set to False, EWS requests will be denied, and your migrations or services relying on EWS may fail. We strongly recommend reviewing your settings in advance. For more information, refer to Microsoft’s official announcement: 👉 [The way to control EWS usage in Exchange Online is changing.](https://techcommunity.microsoft.com/blog/exchange/the-way-to-control-ews-usage-in-exchange-online-is-changing/4383083) If you need assistance, please contact our support team.
- resolved Jul 02, 2025, 12:06 PM UTC
This informational notice about Microsoft’s upcoming EWS access changes is now closed. No further updates are expected. Please ensure your organization has made the necessary adjustments to avoid service disruption