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This article is specifically regarding the Veeam Backup & Replication console failing to connect after the Veeam Backup Server's hostname has been changed.
The error shown in the Cause section of this article may occur due to other reasons, which are documented in KB2127.
Failed to connect to the Veeam Backup & Replication server:
No connection could be made because the target machine actively refused it <IP>:9392
When this occurs, the Veeam Backup Service will be stopped and cannot be started. The diagnostic logging on the Veeam Backup Server will contain the following messages, which show that the server is attempting to connect to the previous hostname.
%programdata%\Veeam\Backup\Svc.VeeamBackup.log:
Info [DB] Connecting to SQL Server (CurrentUser=[NT AUTHORITY\SYSTEM], ServerInstance=[<OldHostname>\<SQLInstanceName>], Options=[Direct])
Info [DB|ERROR] Failed to connect to server
To correct this issue, update the Veeam Backup & Replication configuration with the current hostname by following these steps:
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