Veeam Support has received reports from customers in certain regions that starting on or around August 11th, 2023, Veeam Backup for Microsoft 365 backup jobs protecting exchange data had a sudden and substantial increase in the amount of change data being detected and processed during incremental job runs.

This issue is under active investigation, and we are working closely with Microsoft to address this issue as soon as possible.

Initial results indicate that items in specific folders may have had their idPR_INTERNET_ARTICLE_NUMBER and modification datePR_LAST_MODIFICATION_TIME fields changed in bulk.

This article will be updated as more information becomes available.