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.
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.
This form is only for KB Feedback/Suggestions, if you need help with the software open a support case