Backup repository upgrade fails after upgrading to v5

KB ID: 4075
Product: Veeam Backup for Microsoft 365 | Veeam Backup for Microsoft Office 365 5.0
Published: 2020-12-03
Last Modified: 2021-04-27
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Challenge

A local backup repository fails to upgrade after upgrading to Veeam Backup for Microsoft 365 5.0 version 5.0.0.1061.

Cause

In case when the Team Chat folder has been protected with the earlier version of Veeam Backup for Microsoft 365, a backup repository may contain items with several versions that have identical timestamps. After the product is upgraded to version 5.0.0.1061, this causes a repository database conflict when upgrading local backup repositories.

Solution

To resolve the issue, please create a Veeam Support case.
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