I tested OpenFire on a SBS2008 setting it to ran as a service and it broken networking on the server. I had done some other work about the same time and it took a lot of troubleshooting to determine that OpenFire was the problem. Uninstalling OpenFire did not repair the problem, it required removing some registry keys to repair the network. My advice would be that you will want to be very careful attempting to use OpenFire running as a service.
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