What is mean that Tech Support Mode (TSM) timeout is not enabled for host xxxxx . What should I do in my environment ? is it critical ?
For ESXi 5.x onward, Tech Support Mode is SSH (Remote TSM) and ESXi shell (Local TSM) - VMware Knowledge Base. Though it is not mandatory, you can set the ESXi shell timeout value set using the steps mentioned in the blog - https://www.vladan.fr/three-ways-to-enable-esxi-shell-and-timeout/ (Search for 'ESXi Shell Timeout configuration').
Cheers,
Supreet
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