By default a tombstone lifetime is 180 days (it used to be 60 days on Windows Server 2003 R2), however we can change for any number that we like or most likely that our organization requires. The tombstone will define how many days a deleted account can be recovered from the Recycle Bin.
In order to change the tombstone lifetime, the administrator must open the ADSIEdit.msc, and open a connection settings and select Configuration, as shown in the image below.
Expand Configuration, CN=Configuration, CN=Services, CN=Windows NT, and then right-click on CN=Directory Services and click Properties.
In the new window, select tombstonelifetime and double click on it, define the new value. In our example, we are specifying the period of two (2) years. Click on Apply to confirm.