- Select the Host you want and click the Configuration tab
- Select 'security profile' from the box labeled software
- Click 'properties' on the right hand side
- Select 'Remote Tech Support (SSH)' and then 'options'
- From the window that pops up click the 'start' button and then the 'Start automatically' radio button as shown below
However, enabling ssh will prompt a 'configuration issue' that just won't go away.

# /sbin/services.sh restart
Give it a minute and you'll have easy access to your ESXi servers, able to survive a reboot without a pesky warning.