One other factor I should include as an update, in further discussions with the people working on the issue here there seems to be some confusion as to whether the factory wipe and re-enroll steps took place.  I may have misunderstood the timeline, and its possible that only the Deletion while the device was offline was performed. 

Would you approach it differently if we had unenrolled/deleted the device from the Console while the unit was offline and then experienced the Lockdown password problem as soon as the unit was restored to function, without an attempt at re-enrolling?

At least i would give it a shot as it' fast and easy to do, to trigger the search sync via global settings and see if the device then re-appears.

Im also, because of problems like this, not a fan of FRP.
Maybe it's worth to investigate with Support to lookup the device in the DB (so if it at least is there somehow but not shown in the console). Also (if you have it on the lockdown which i guess is not but worth to ask) do you have stagenow available in the lockdown to use their barcodes for factory reset?

And as we talk about StageNow, did you reset using their barcode or doing it via settings menu?
I sk because, at least my experience shows, if you do it via Settings, there might me data left on the device even after the wipe and this could explain the device behavior. It maybe was not entirely wiped (enterprise partition) so after setting up the device again, it still had some of the information about the configs you see now without contacting the server really. I can't remember how our devices looked like when i experienced issues with that as we fastly switched to wipe only via StageNow barcode or SD-card (because of ZTE we don't see the need for FRP).

Thank you Rafael, I was trying to reply directly to your comment from yesterday but it doesn't look like the forum will allow me to. 

I appreciate the heads-up about the search sync, I was easily able to trigger it as you said but unfortunately it does not appear to have helped.  Your suggestion regarding StageNow is also a very good one, I think we will need to look into adding it to Lockdown for future use because I do think it could save us in this case, but unfortunately it is not available to us now with the current state of this unit.

I do think that an incomplete wipe, Enterprise wipe, or incomplete enrollment/un-enrollment is the cause unfortunately I don't know what I can confirm the specifics after the fact.  It is clear that Lockdown is still present, but SOTI settings are no loaded, and I think any one of the above would potentially be a source of that.  Due to the exact nature of the various restricitons I think we are likely just stuck on this unit.  I am going to switch my focus from recovering this unit to eliminating or reducing the risk of a reoccurrence, because unless I can bypass Lockdown or FRP we have no access to the unit to make any OS or configuration changes.  

I appreciate you taking the time to try and help, can you answer one more question?  We did not intentionally enable FRP, and in our environment it is of limited use, but all of our TC devices appear to have it as soon as we use StageNow to enroll them in SOTI.  Do you know if there is a way to intentionally disable or turn off FRP, without needing to use ZTE?