WARN - No VMWare Tools installed, outdated or not running

Hello,

does anyone know the warning fom check_MK and know how to fix it?
I tried to start the service but it does not help.

This probably means that the ESXi-Server the virtual machine is running on was updated and now there is a new version of the VMware-Tools-Package you can/should install on the VM.
If it is a Linux VM you can also switch to open-vm-tools if your distribution has a package for that, as this is also what VMware recommends these days and then you won’t have this problem in the future.

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