#1 Global Leader in Data Resilience
#1 Global Leader in Data Resilience
BACK TO KB LIST

How to Temporarily Disable Exchange Web Services Throttling

KB ID: 4198
Product: Veeam Data Cloud for Microsoft 365
Veeam Backup for Microsoft 365
Published: 2021-08-18
Last Modified: 2024-10-29
mailbox
Get weekly article updates
By subscribing, you are agreeing to have your personal information managed in accordance with the terms of Veeam's Privacy Notice.

Cheers for trusting us with the spot in your mailbox!

Now you’re less likely to miss what’s been brewing in our knowledge base with this weekly digest

error icon

Oops! Something went wrong.

Please, try again later.

Purpose

This article documents how to temporarily disable Exchange Web Services API throttling, potentially improving Exchange backup performance in Veeam Backup for Microsoft 365.

Note: Throttling may only be disabled temporarily; this should be sufficient to allow Veeam Backup for Microsoft 365 to perform the initial full backup.

Cause

By default, all download requests performed by a backup job interacting with Exchange Web Services API are throttled, impacting backup job performance. It is possible to turn this throttling off in Microsoft 365 admin center temporarily.

Solution

Before disabling EWS Throttling Policy, it is suggested to perform an Exchange Online connection performance test using Microsoft Support and Recovery Assistant tool. If the performance test reports bandwidth speed greater than what is seen in the Veeam Backup for Microsoft 365 backup job, it is advisable to temporarily disable EWS Throttling.

How to temporarily disable EWS Throttling Policy

  1. Go to admin.microsoft.com and sign in with administrator credentials
  2. On the left Navigation panel, expand the Support section and select New service request
    If this option is unavailable, click Show all at the bottom of the Navigation panel.
support service request
  1. In the panel that appears on the right side, type EWS into the search box and select the "Increase EWS throttling policy" option from the auto-complete list.
Select the "Increase EWS throttling policy" optin in the autocomplete option list.
To the best of our ability, we have captured screenshots of this procedure and the menu options that appear. However, some UI elements may appear differently for each organization. If the option to Increase EWS Throttling Policy or the option to Run Tests does not appear, please contact Microsoft 365 Support.
  1. Click the "Run Tests" button to determine the current throttling state:
Run Tests to check throttling state
  1. After the test completes one of three results will be presented:
  1. "The Exchange Web Services are Throttled." with an option to request the throttling be temporarily changed. 
    After clicking "Update Settings," a confirmation message will be shown.
screenshot
Success updated throttling
  1. "The Exchange Web Services are Throttled." with a note advising to create a new service request with Microsoft Support to change the throttling policy.
Throttling is enabled, contact microsoft to request policy change.
  1. "Your Exchange Web Services are not currently throttled." with a note stating when throttling will be reapplied.
screenshot

More Information

More details regarding Exchange Web Services throttling can be found here: EWS throttling in Exchange.
 
Should you experience any challenges during the completion of this procedure or have questions on EWS throttling, please reach out to Microsoft support.

 

To submit feedback regarding this article, please click this link: Send Article Feedback
To report a typo on this page, highlight the typo with your mouse and press CTRL + Enter.

Spelling error in text

This site is protected by hCaptcha and its Privacy Policy and Terms of Service apply except as noted in our Privacy Policy.
Thank you!

Thank you!

Your feedback has been received and will be reviewed.

Oops! Something went wrong.

Please, try again later.

You have selected too large block!

Please try select less.

KB Feedback/Suggestion

This form is only for KB Feedback/Suggestions, if you need help with the software open a support case
By submitting, you are agreeing to have your personal information managed in accordance with the terms of Veeam's Privacy Notice.
This site is protected by hCaptcha and its Privacy Policy and Terms of Service apply except as noted in our Privacy Policy.
Verify your email to continue your product download
We've sent a verification code to:
  • Incorrect verification code. Please try again.
An email with a verification code was just sent to
Didn't receive the code? Click to resend in sec
Didn't receive the code? Click to resend
Start using Veeam:
Download the product
&
Activate the license key
Thank you!

Thank you!

Your feedback has been received and will be reviewed.

error icon

Oops! Something went wrong.

Please, try again later.