I am having trouble finding a feature that was in TFS2015.
In TFS2015 i could set folder and file level securty, but i can't find that option in TFS2018. Has this feature moved, or been removed?
TFS2015:
TFS2018:
This isn't due to a difference between versions of TFS, it's due to differences between TFVC and Git.
In the first screenshot (TFS 2015) you are working within a TFVC repository, in the second (TFS 2018) a Git repository.
TFVC and Git have different security models so it's not possible to lock down a specific path in a Git repo like you do in TFVC. With Git repos in TFS you could either: