For a lot of year we have had a 2003 domain and mostly XP workstations. Via a GPO on the server I have disabled offline files and it had been disabled forever. I didn't notice the problem over the last two years while replacing XP workstations with Windows 7 and the 2003 Servers with 2012 but today was an eye opened.
On a Windows 7 x64 workstation (in Sync Center) the offline files were enabled and greyed out so you couldn't change the state. I went back and double checked the Default Domain GPO and verified that the offline files were disabled. Disabled yet they were enabled on this Windows 7 box. The fact that the button was greyed out would indicate that the domain GPO was in effect but the state of the offline files was incorrect.
I finally had to go in to gpedit on that workstation and disable offline files. It work which, to me, means the network GPO was not the reason the offline files button was greyed out.
Very, very strange. As a footnote I did replace two of the 2003 servers with 2012. Does anyone have any idea what is going on with the offline files GPO and these W7 workstations?