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Veeam Backup for Microsoft Office 365 5.0 cumulative patch KB4078


Please confirm you are running Veeam Backup for Microsoft Office 365 build or prior to installing this cumulative patch KB4078. You can check this by clicking Help and Support > About in the main menu of the Veeam Backup for Microsoft Office 365 console. After upgrading, your build version will change to (version 5a).

As a result of on-going R&D effort and in response to customer feedback, cumulative patch KB4078 provides a set of enhancements and bug fixes, the most significant of which are listed below:

Resolved issues

  • After upgrading to Veeam Backup for Microsoft Office 365 version, a local backup repository fails to upgrade with the “Error: JetError -1605, JET_errKeyDuplicate, Illegal duplicate key” error.

  • Personal sites are not backed up using a backup job that is configured to protect an entire organization.

  • Updating the installed product license fails with the “Failed to check for license update” error. 

  • Checking for available product updates fails with the “Failed to check for updates” status.

  • After upgrading to version 5, browsing backups with Veeam Explorer for Microsoft Exchange fails with the "Unable to find mailbox account" error.

  • If a local repository was configured with the snapshot-based retention, Microsoft Teams data that is within the specified retention period may be unavailable for browsing after retention cleanup is applied.


To install the cumulative patch KB4078:

  1. Download
  2. Execute VeeamBackupOffice365_5.0.0.1070_KB4078.msp as administrator on the Veeam Backup for Microsoft Office 365 server.
  3. Execute VeeamExplorerForExchange_5.0.0.1070_KB4078.msp as administrator on each machine where Veeam Explorer for Microsoft Exchange is installed.
  4. Execute VeeamExplorerForSharePoint_5.0.0.1070_KB4078.msp as administrator on each machine where Veeam Explorer for Microsoft SharePoint is installed.
  5. Execute VeeamExplorerForTeams_5.0.0.1070_KB4078.msp as administrator on each machine where Veeam Explorer for Microsoft Teams is installed.

If there are any remote proxies in your environment, update those as described here.

MD5: eddf07c4002ead98f5f44ab586080c84
SHA-1: ef367a49bf9674af125184a9f6cf78a310aabb09
Veeam Backup for Microsoft Office 365 5.0
Last Modified:
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