For some unknown reason, the ‘Install VMware Tools’ was greyd out.
I tried to remove and re-add CD/DVD, but that didn’t work.
Ultimately, I had to download .exe and install manually from within the VM.
ESXi VMTools download<a href="https://packages.vmware.com/tools/esx/latest/windows/x64/">https://packages.vmware.com/tools/esx/latest/windows/x64/</a>