- Veeam Support Knowledge Base
- Veeam Backup for Microsoft 365 4c cumulative patch KB3222
Veeam Backup for Microsoft 365 4c cumulative patch KB3222
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Requirements
Please confirm you are running Veeam Backup for Microsoft 365 build 4.0.1.531 prior to installing this cumulative patch KB3222. You can check this under Help > About in Veeam Backup for Microsoft 365console. After upgrading, your build version will change to 4.0.1.545.
As a result of on-going R&D effort and in response to customer feedback, cumulative patch KB3222 provides a set of enhancements and bug fixes, the most significant of which are listed below:
Enhancements
- Optimized reading from object storage repository to reduce the cost of querying the first 100 items in a folder when exploring backups with Veeam Explorers.
- Parallel processing of requests for obtaining used space in backup repositories initiated via PowerShell or REST API on multiple proxies.
- Reduced backup times to object storage repositories targets when processing SharePoint and OneDrive for Business items with thousands of versions.
Resolved Issues
- After updating to Veeam Backup for Microsoft 365 4c (build 4.0.1.531) backups start to fail with the “Proxy offline time exceeded” error. For more details, see KB3216.
- Under certain conditions, the backup proxy server sends ‘Success’ notifications about backup job completion results for backup jobs failed with the “Proxy offline time exceeded” error.
- Unable to update certificate information for S3 Compatible object storage after the trusted certificate has been changed and a backup repository extended to such object storage goes to the ‘Invalid’ state.
- OneDrive restore in the Modern Authentication mode fails with the “Cannot connect to Office 365” error.
- Backup job initiated with the /v4/Jobs/{backup_job_id}/action REST API request performs full backup sync instead of incremental sync.
- In the UI, changes to the schedule of applying retention policy settings for existing backup repositories are not saved.
- SharePoint backup fails with the “The Attachments column does not exist. It may have been removed by another user” error.
- Under certain conditions, in the Modern Authentication mode with legacy protocols enabled, Public Folder mailbox backup fails with the “Too many concurrent connections opened. Cannot open mailbox” error.
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