I made the change in ADSIEDIT to enable Inter-site change notification after adding a second AD site on our domain.
The domain level and the old domain controllers in the main site are Server 2008 and the new domain controller for the new site is 2012 R2.
I tested it by adding and deleting users on a domain controller and checking that the users were added or deleted on the domain controller at the other site. It seemed to be working fine with that test. I could see the change within seconds.
However, I noticed that group membership changes and account lockout status are not updating quickly between sites.
I went back to ADSIEdit and saw that the "1" that I had entered in options a few days earlier was gone and it shows <not set> again.
I put the 1 back in and then when to a different domain controller and it still shows not set there.
What needs to be done to make sure that these changes stick and replicate between sites?