New
#51
While Enterprise can normally only be Volume Licence activated, other Editions of Windows 10 can be VL or Retail or OEM licenced. Pro can be VL activated as the OP's is or was. Enterprise, Pro and Education can be VL activated. I think in most cases, unless your the IT guy or in the IT department, you'd likely be given Pro not Enterprise. More often than not there would be group policy restrictions so no point in using Enterprise and then crippling it. My guess is the Pro license is also probably cheaper.
What can happen is company X goes out of business and the assets are sold off. Those devices are supposed to be wiped of any corporate installs, especially VL installs. But if the guy that normally does this is looking for a new job, it sometimes doesn't get done. I personally wouldn't be in any hurry to do it unless I was going to be paid for the time and trouble.
Other scenarios are inept tech support that don't have a clue what they're doing. Of straight out fraud by the seller.