Access Denied when Writing Files to a windows 2008 R2 server over the network

When Trying to edit/change a file to an IIS Share on one of the windows 2008 R2 servers you get an error message that access has been denied.
The user writing the files has all the proper security settings on both the share and the directory/file.
The user can create new files in the directory.

If the user logs in to the server and tries to change the file he gets a message stating: You'll need to provide administrator permission to copy/move/edit etc... this file



This problem can be resolved by giving the users group write permissions to the folder.