Tech Tip : MAKE YOUR SHARE VALID FOR A CERTAIN PERIOD
All you need to do is,
2. Click on the “Advanced Options”.
3. In the Manage Share Dialog that appears, Click on “Expires” under Expires Section. Pick a date.
4.Click on “Update”.
Thats it! Your share will be now valid only till the expiry date! Once the Expiry date has reached the share URL becomes invalid.