The GA build of Veeam Backup for Microsoft 365 version 4c (build 184.108.40.2069) was recalled due to a backup sync issue identified by Veeam quality assurance.
If you are running build 220.127.116.119 please refer to the KB3194 and install the corresponding patch.
The latest 4c Day 0 Update build 18.104.22.1681 is now available for download with the link provided below.
Please confirm you are running on of the following versions of Veeam Backup for Microsoft 365 prior to installing version 4c:
You can check the product version under Help > About in the Veeam Backup for Microsoft 365 console. After upgrading, your build version will change to 22.214.171.1241.
Version 4c delivers new features and enhancements and includes a set of bug fixes listed below.
When protecting Office 365 tenants using modern app-only authentication, consider the following:
For the full list of System Requirements, Known Issues, Installation and Upgrade considerations, please refer to this Release Notes document.
Veeam Backup for Microsoft 365 version 126.96.36.1991 is applicable to:
Version 188.8.131.521 is NOT applicable to installations on top of:
Upgrading backup repositories from version 3.0 to 4c may take significant time to complete and the upgrade duration highly depends on the amount and type of backup data in a repository. According to the test results, it may take up to 8 hours in the setup with 1 TB of data in a backup repository. Plan for an appropriate maintenance window when your backup repository that is been upgraded is not available for use.
To install Veeam Backup for Microsoft 365 4c Day 0 Update:
When upgrading from Veeam Backup for Microsoft 365 version 3.0, after version 4c is installed, all backup repositories, backup proxies, and backup jobs will be marked as Out of Date. You need to upgrade these components manually from the Veeam Backup for Microsoft 365 UI.
When upgrading from Veeam Backup for Microsoft 365 versions 4a and 4b, after version 4c is installed, all backup jobs that contain Office 365 group objects will be marked as Out of Date. You need to upgrade these jobs manually from the Veeam Backup for Microsoft 365 UI.
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