Make sure that the resultant backup lifetime in your Active Directory environment is equal to or greater than 180 days. If ...

Make sure that the resultant backup lifetime in your Active Directory environment is equal to or greater than 180 days. If Active Directory Recycle Bin in your environment is not enabled, increase the resultant backup lifetime in your forest by ensuring that the value of the tombstone lifetime is equal to or greater than 180 days. If Active Directory Recycle Bin in your environment is enabled, ensure that the recycled object lifetime (stored in the pre-existing tombstoneLifetime attribute) and the deleted object lifetime (stored in the msDS-deletedObjectLifetime attribute) are equal to or greater than 180 days.