Strange that changing IP did this problem to your Openfire setup.
We did as well changed our AD IP address but we didn't had such issue.
The procedure we did for changing the AD IP address is this.
- Demoted the AD to WORKSTATION
- Changed the IP address of the AD
- Promote the Server to AD using the new IP add
- Backup OpenFire configuration
- Demoted the OpenFire Server back to Workstation
- Change IP add on the range of the new IP
- Promoted again to the new AD connection.
- Restored back the OpenFire Configuration.
That's it. Ship sailed smoothly.