Tasks can be made inactive
Supported on: At least Windows Server 2008 R2 or Windows 7
Registry
HKCU
software\policies\microsoft\office\16.0\ms project\options\scheduling Value name: canmakeinactivetasks
Enabled: canmakeinactivetasks = 1
Disabled: canmakeinactivetasks = 0
Description
This policy setting will allow tasks to be inactivated. If you enable or do not configure this policy setting, users will be able to use the Inactive tasks feature, and tasks are allowed to be inactivated. If you disable this policy setting, tasks cannot be inactivated.