Event ID - 20066

Event Id20066
SourceISA Server H.323 Filter
DescriptionRegistration with the H.323 Gatekeeper at address %1 failed. This will prevent inbound calls.
Event InformationAccording To Microsoft:
Communication with the Gatekeeper could not be established.

Resolution:
Check that the Gatekeeper details are configured correctly and that there is network connectivity. For details about configuring Gatekeeper details, see topic "To configure H.323 filter" in ISA Server Help.
Reference LinksMicrosoft product: Internet Security and Acceleration Server Version: 4.0.3443.594 Event Source: ISA Server H.323 Filter Event ID: 20066

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