I've got a single folder within the list of All Folders that I can't change any user permissions on.

I'm logged in as an admin and when I view security for the folder it says I have full rights to the folder yet i can't change anything on it or it's sub folders even though it clearly shows me as having rights to "Modify the rights users have to objects".

As a test I added a new sub-folder called Test which created ok but I'm not able to then delete the sub folder or change it's permissions either.

Interestingly we changed permissions on one sub-folder last week without issue but when I check that folder today I now can't update it.

Any ideas anyone?