Troubleshoot Exchange Server 2007 Error Code 8206

Exchange Server 2007 users experience this error while adding calendar entries or saving appointment in it. This blog will talk about various reasons behind this error, its variant and also elaborate different relevant methods to resolve this error. Application based on custom MAPI or CDO which refers to Collaboration Data Objects of Microsoft Exchange Server 2007 are utilized for modifying the calendar items. But when user tries to save appointment an error is generated showing that calendar agent has failed. This usually happens if user has already saved many appointments or has made recurrent calendar entries. Following application event log is created after such error;