You may find it necessary to block your Scheduler to prevent modifications to allocated shifts made by fellow Attendance users (such as department heads) before you make allocations to attendance exceptions.
You can block your Scheduler by setting a date which prevents allocated shift modifications from being made prior to the date set.
To block your Scheduler up to a certain date:
Go to Attendance > Main > Scheduler.
Click on the Settings menu.
In the 'Scheduler View Settings' modal, enter a date in the Block to field.
Users can now modify only those shifts that are allocated after the 'Block To Date'.