| Event Id | 21018 |
| Source | ISA Server NNTP Filter |
| Description | The monthly summaries could not be deleted. Use the source location %1 to report the failure. |
| Event Information |
According to Microsoft : CAUSE : This failure may occur for one of the following reasons: The log summary configuration is invalid.The log summary file can not be accessed. SOLUTION : Check the validity of the log summary configuration.Try to manually delete the log summary file. |
| Reference Links | Event id: 21018 Source id: ISA Server NNTP Filter |
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