Cannot disable client backup in Server 2012 R2 Essentials

I have installed Server 2012 R2 Essentials for a customer, but i cannot disable Client backup.
I have not diskspace on this server to take backup of the Client machines, and hope there is an option for disabling backup or uninstall the Connector software.

Hi,
Please refer to the following operations and disable backup for a computer.
Open the
Dashboard. And click the Devices tab.
Click the name of the computer for which you want to disable backups.
In the Tasks pane, click
Customize Backup for the computer. The Customize Backup wizard appears.
Click
Disable backup for this computer, and then select whether you want to keep or delete the existing backup files. And then click
Save changes.
There is an article for those operations, please refer to.
Disable backup for a computer
http://technet.microsoft.com/en-us/library/jj713515.aspx
Hope this helps.
Best regards,
Justin Gu

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