Before installing this Cumulative Patch, you need to confirm that you use Veeam backup for Office 365 build 184.108.40.2061 or 220.127.116.113. From the Veeam console, click on Help and Support then on about.
Announced at Veeam ON 2020, Veeam Backup for Office 365 Version 5 is now available. It offers the advantage of eliminating the risk of losing access and control of Office 365 data. Exchange Online, SharePoint Online, OneDrive for Business and Microsoft Teams are now protected. With this new version, it is easier to restore documents and files present in Teams. Indeed Veeam has implemented a new explorer for Teams.