Users are able to select the tasks for future assignments months ahead and post time for them. We are looking for a way to restrict the users from doing this
Steps to Reproduce:
What you are trying to achieve is possible via a rule in MUX Timesheets.
This rule will be checking any user submissions for assignments that haven't started and will throw an error like this when they try submitting a timesheet:
This timesheet cannot be submitted due to errors. Please correct the items and resubmit. <Your custom error message goes here>
Please note that in Classic this is not currently possible via UI or a rule.