Disk Space tab is gone in Administrator

Hi Folks,

I noticed that on my both Notes Admin Clients (6.5.1) the “Diskspace” Tab is gone - the one which used to be at the right “Navigator” of the “Files” tab.

Having the server set to “Local”, the “Disk Space” tab is shown and HDD disk space is shown correctly.

When switching to any server, the “Disk Space” tab disappeares. Servers are 5.0.8, 5.0.10, 5.0.12, 6.5,

Any idea?