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A backup attempt for SharePoint Online and OneDrive objects may fail with the following message: Cannot complete this action. Please try again. Total count of failed items: N Underlying Error: Server error of type Microsoft.SharePoint.SPException occurred: (-2147467259) Cannot complete this action.
Enumeration requests issued during SharePoint Online and OneDrive backup are processed by the SharePoint Online service, and the success of any individual request depends on the capacity available to the service infrastructure, the size and complexity of the request, and the volume of content being evaluated. Because these factors interact, an identical request against the same site can complete while the infrastructure is under low load and exceed the processing limits of the service when demand is higher. This behavior is most commonly encountered when a SharePoint incremental crawl processes more than 150 item changes, which increases the processing required to complete the request.
Veeam Backup for Microsoft 365 Customers Customers are advised to upgrade to the latest version of Veeam Backup for Microsoft 365. Starting in Veeam Backup for Microsoft 365 v8.6, changes were made to mitigate this issue without requiring the manual configuration parameter changes previously documented in this article.
Similar Issue from February 2026 Challenge A backup attempt for SharePoint Online and OneDrive objects may fail with the following message: Cannot complete this action. Please try again. Total count of failed items: N Underlying Error: Server error of type Microsoft.SharePoint.SPException occurred: (-2147467259) Cannot complete this action.
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