Challenge
Cannot install Veeam ONE Agent from the Monitor client console to the Veeam Backup&Replication server(s) because the Install agent option is grayed in the action panel and shortcut menu.
Cause
There are several possible causes for this issue:
- Veeam ONE Agent is already installed on the Veeam Backup&Replication server. In this case, the Remove, Repair and Agent settings options must be available.
- Port 2805 or required permissions are not configured properly, so Veeam ONE cannot communicate with the Agent client application deployed on the remote Veeam Backup&Replication server.
- Veeam ONE Agent installed on the Veeam Backup&Replication server has a Master (server) role and cannot connect to the Veeam ONE server due to its configuration.
Solution
By design, you cannot install Veeam ONE Agent twice on the same server. Check that Veeam ONE server can collect the diagnostic data from the specific Veeam Backup&Replication server. If not, do the following:
- Make sure that port 2805 is open and all the needed permissions are configured as described in the Deployment Guide.
- Reinstall Veeam ONE Agent on the Veeam Backup&Replication server manually specifying its role:
Option 1: via the Setup dialogue
Login to the machine that runs Veeam B&R server and mount the Veeam ONE installation ISO file (mount or unpack it). Run the following command in the command line with the elevated privileges (as Administrator):
msiexec.exe /L*v "C:\ProgramData\Veeam\Setup\Temp\Veeam ONE Agent Install.log" /i "F:\Agent\VeeamONE.Agent.x64.msi" ACCEPT_THIRDPARTY_LICENSES="1" ACCEPT_EULA="1" VO_AGENT_TYPE="0" VO_BUNDLE_INSTALLATION="0"
- Select the Remove option to uninstall the incorrectly working Veeam ONE Agent
- Run the same command again and then select the Install option
- Specify Veeam ONE service account credentials, password and desired port number for the Veeam ONE Agent
VO_AGENT_TYPE="0" - means that the Agent must be deployed on the Veeam Backup&Replication server(s) as the Agent Client. The master (server) role must be configured only on the Veeam ONE server (Agent Type "1" + Bundle Installation "1").
Option 2: silent installation
Alternatively, you can prepare the commands in advance and then execute them in the command line (with the elevated privileges):
msiexec.exe /x "F:\Agent\VeeamONE.Agent.x64.msi" /qn msiexec.exe /L*v "C:\ProgramData\Veeam\Setup\Temp\Veeam ONE Agent Install.log" /i "F:\Agent\VeeamONE.Agent.x64.msi" ACCEPT_THIRDPARTY_LICENSES="1" ACCEPT_EULA="1" VO_AGENT_TYPE="0" VO_AGENT_SERVICE_ACCOUNT_NAME="DOMAINNAME\accountname" VO_AGENT_SERVICE_ACCOUNT_PASSWORD="PASSword" VO_BUNDLE_INSTALLATION="0" VO_AGENT_SERVICE_PORT="2805"NOTE: Replace the account and the password with your Veeam ONE service account credentials.
VO_AGENT_TYPE="0" - means that the Agent must be deployed on the Veeam Backup&Replication server(s) as the Agent Client. The master (server) role must be configured only on the Veeam ONE server (Agent Type "1" + Bundle Installation "1").
For more information check the Deployment Guide.
More Information
In case the solutions provided in this KB article do not help, contact Veeam Technical Support.