How to Disable EWS throttling in Microsoft 365

Log in to Office 365 admin page https://admin.microsoft.com/

Click Show All in the feature pane.

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Click Support and follow with New service requests.

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In the search field, search for throttling. Select Increase EWS Throttling Policy from the list.

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Click Run Tests.

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Diagnostic tests are running.

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Select the duration in days. The options are 30 days, 60 days, and 90 days. Check the checkbox to acknowledge the change and click Update Settings.

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You will get a message showing Success. The update to Exchange Web Services (EWS) throttling policy started. The update will complete within 15 minutes.

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Verify that throttling is disabled in Office 365 

After 15 minutes, run the test again to check if the changes are applied.

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You can see that Exchange Web Services (EWS) is currently not throttled. 

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