I have the ZCM appliance that I have upgraded to ZCM 11 SP4 in a single Primary Server system. I was able to then deploy the update to three or four WS successfully. (I had done the 'Post 11SP4 Update Prereq' before this.) I then brought more WS into the Zone and when I went to upgrade them by checking the box for 'Update for ZENworks 11 SP4 (11.4.1)' in the 'Available System Updates' section of the System Updates tab, the option to 'Deploy update to devices' was grayed out.

How do I enable this again so I can apply the update to other Windows that are currently running 11.2?