Hello @Anne ,
Thank you for posting here.
Check if your machine is already in one domain (such as a local AD domain). If so, you should remove your machine from the domain and login to the local admin and then check if the option appears.
For example:
In my lab, the client is in one local domain b.local, then I will not see this option.
Hope the information above is helpful.
Should you have any question or concern, please feel free to let us know.
Best Regards,
Daisy Zhou
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