HCX System ID is needed when you are working with VMware support team regarding any HCX issues.
HCX system id can be found via CLI as well as GUI. We will discuss both methods in this post.
CLI Method (You can only find on-prem HCX system id using this method)
Connect to the on-prem HCX ENT appliance via console or SSH using admin credentials and run command: cat /common/location
[admin@hcx-ent ~]$ cat /common/location
Login to vSphere Web Client and click on HCX plugin and navigate to Administration > System Updates
Under the Info column click on the ‘i’ icon and it will show you the system id which you can copy to your clipboard.
Do the same to obtain the Remote HCX System ID.
Keep these ID’s handy and provide them to VMware when requested.