| Event Id | 20004 |
| Source | ISA Server NNTP Filter |
| Description | H.323 filter: failed to bind IP address 1 for listening. Future H.323 incoming calls will be refused. |
| Event Information | According To MIcrosoft: The required port may be in use by a different application. Resolution: Verify that no other application is using the relevant H.323 ports and then retry. |
| Reference Links | Microsoft product: Internet Security and Acceleration Server Version: 4.0.3443.594 Event Source: ISA Server NNTP Filter Event ID: 20004 |
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