Migrating OpenFire Linux server with stand-alone DB to a Windows server with AD

So I’ve installed and properly configured OpenFire Windows server with AD auth and have successfully connected with the Spark client just by changing server address and with my AD credentials. My question is if it is possible to connect the two servers so that users connected to the new server can chat with users still connected to the old server and vice versa so that I can slowly move the clients as I touch the machines and verify users actually remember their AD password. Thanks!