Veeam Backup for Microsoft 365 5c cumulative patch KB4187

General

• Under certain conditions a proxy may fail with the “Out of Memory” error during backup to an object storage repository.

Backup

• Microsoft Teams backup may fail with “Folder processing failed: Team Chat. Restriction contained too many elements” error.
• Backup of Team Chat messages created after October 2020 may fail with the “Failed to get TeamsMessagesData folder” error.
• Microsoft Teams backup fails with “Object reference not set to an instance of an object” error.
• OneDrive backup fails with “Object reference not set to an instance of an object” error if there’re any large OneNote files that are open and being edited during backup.

Restore

• In BaaS scenarios, exporting backup data to a local disk on the tenant side fails with the timeout error.
• Export operation in Veeam Explorer for Microsoft Exchange may fail with the “Connection to server was unexpectedly closed” error.
• For larger Office 365 organizations, some OneDrive accounts may not be displayed in the “Copy OneDrive” wizard

RESTful API

• SharePoint site title field is empty if such a site has been added to a backup job explicitly via REST API and the site title has not been explicitly specified.
• Removing a group with audit items via REST API doesn't work as expected but reports back response code 200.
• In BaaS scenarios with the modern app-only approach, obtaining a token for tenant authentication via REST API fails if a combination of capital and lower-case letters is used to specify the client_id parameter.