@JayR-0016, Thanks for posting in Q&A. To export all the logged in user property of one device configuration policy, you can click export in the following location.
If you want to get currently log on user on devices, you can try the whoamI command.
Meanwhile, usersLoggedOn stores the last logged on user object id of a device. You can read the following link to see if it can get any information you want.
Hope the above information can help.
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