Job Log reports the following errors:
Backup- SCF::\\Test.ontest.com{fc967699-f3df-4a28-a723-398ad43e9859}\O365Family\O365Teams
V-79-57344-43277 - An error occurred in deserializing data.
V-79-57344-43320 - Backup Exec obtained data from SaaS Connector Framework when it expected metadata. An error in backing up the previous item is the likely cause.
The errors are seen due to M365 Teams posts having special (non-UTF-8) characters.
This issue is resolved in Backup Exec 23