| Event Id | 8209 |
| Source | EXCDO |
| Description | Calendaring agent failed with error code name while cleaning up the calendar. |
| Event Information | According to Microsoft: Cause: This message indicates an unexpected condition or exception in the free/busy module. It may indicate a serious error. User Action : Stop and restart Microsoft Exchange System Attendant service. |
| Reference Links | More information Exchange (EXCDO) |
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