We had this problem with Mojave, and found that in our Prestage
Enrollment if we unchecked 'Hide Account' under the 'Create an
additional local administrator account' in the Account Settings, we did
not have this unclickable icon anymore and the logi...
Hello!The good folks on the Penn State MacEnterprise Mailing List helped
me figure this out today. You can remove the 'Lock Screen' button from
the Apple menu with this command:/usr/bin/defaults write