Error When Adding Veeam Backup for Microsoft 365 to Veeam ONE
Challenge
When attempting to add Veeam Backup for Microsoft 365 to Veeam ONE, either of the following error occurs:
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Failed to connect to “localhost”.404 Not Found
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Failed to add the Veeam Backup for Microsoft 365 server. The server version is not supported.
Cause
Both errors occur for the same reason, the version of Veeam Backup for Microsoft 365 installed is not supported for integration with Veeam ONE.
As documented in the Veeam ONE User Guide > Integration with Veeam Backup for Microsoft 365:
Veeam ONE offers monitoring and reporting capabilities for Veeam Backup for Microsoft 365 version 7 and later builds.
Solution
Ensure the that Veeam Backup for Microsoft 365 server being added to Veeam ONE is running Veeam Backup for Microsoft 365 7 or higher.
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