May I ask which version of Veeam Agents do you use?
Recently we have thread with similar issues maybe discussion there will be helpful.
The first time the job is launched, a folder with the backup will be created. But if such a folder already exists, then the backup will be created in the <folder>_1 (and so on)
So if you have several jobs with the same name for different Window PC, it can cause such behavior, as folder already exists.
Hi Lukasz,
I would recommend to upgrade Veeam Agent for Windows to the latest version 6.2.0.121, which has been released recently.
If the issue still exists on this version, please reach out to our customer support team and create a support case to investigate this technical problem.