SUMMARY :
     When you modify a policy for an individual user, in the Edit User screen, the only date option available is 'Effective Date' which is a compulsory field. But when you do a mass edit and try to change a time off policy in the Edit User screen, you get 'End Date' along with Effective Date. If you provide an end date for this policy and save, you will encounter an error that says " Time Off Code Policy must have a value for the future ".(Picture1)

RESOLUTION :
     While doing a mass edit for a time off type, do not enter any value for the 'End Date'. Since this column is not a compulsory field, you will be able to save the policy changes without entering any date.