Event ID - 21198

Event Id21198
SourcePOP Intrusion Detection Filter
DescriptionThe client certificate was revoked due to an invalid or missing Certificate Revocation List (CRL). The CRL may have expired and ISA Server was unable to download a valid CRL. Verify that the CRL download system policy configuration group is enabled and that there is connectivity to the CRL Distribution Points (CDPs).
Event InformationAccording To Microsoft:
The CRL may have expired and ISA Server was unable to download a valid CRL.

Resolution:
Verify that the CRL download system policy configuration group is enabled and that there is connectivity to the CRL Distribution Points (CDPs).
Reference LinksMicrosoft product: Internet Security and Acceleration Server Version: 4.0.3443.594 Event Source: POP Intrusion Detection Filter Event ID: 21198

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