You can stop using reimbursement policy for certain employees through the Finance menu, and Reimbursement submenu. Therefore, employees can no longer use the policy.

 Here are the steps:

1. Go to the Finance menu, and select Reimbursement.
2. Click “Assign / Update”.
   
3. Click the “New” button.
   
4. Select the reimbursement policy you want to terminate.
   
5. Determine the termination date.
   
6. Select Expired in the field type.
   
7. Fill in the fields Description with the reason why the reimbursement is expired.
   
8. Click “Add”.
   
9. Select the employee whose reimbursement will be terminated.
   
10. Click "Yes".
    
11. On this page, you can delete employees from the list of expired reimbursements by clicking “Delete”.
    
12. You can also enter the employee list in bulk by clicking the “Import” button. Click here to learn more.
    
13. Click “Save”.
    
14. You can see the reimbursement action that has expired in the Type column.
    

That's the explanation of how to stop the reimbursement policy. You can also learn how to manage reimbursement policy settings, here.