File locked for editing by a disabled user

Hi,

We have a file server running Server 2016. We have some Word docs on a network share which several people use for mail merges.

This has happened twice now in the last 6 months or so. Someone tries to open one of these docs and it tells them that the file is locked for editing by a user that has been disabled for over a year. (It was the same user both times; I double checked to make sure it was disabled) I go into Computer Management > Shared Folders > Open Files and I find that the file is not locked by anyone at all. I am able to open and close the file, then the user who complained is at that point open to use the file.

I researched this before and found something that explained that the user name displayed really doesn't have anything to do with the user object itself, but how Windows Server deals with authorization tokens for file shares... but I do not remember the details and I cannot find this article again. I don't even know if that is accurate. But I was wondering if someone might be able to lend some advice?