Unmanage interfaces is not working anymore

Unmanage interfaces is not working anymore

Hi,
 
I used to unmanage interfaces before and it worked.
Currently I have 2958 interfaces in unmanaged state.
I need to add ~1500 to these.
However, when I mark the interfaces I want to unmanage and click "unmanage" - nothing changes.
I have a nice note on the top: "Interface unmanaged successfully" but there's no result.
 
Server was rebooted.
 
Is there solution to it?
 
Kind regards,
Pavel
                New to ADManager Plus?

                  New to ADSelfService Plus?