Event ID - 8207

Event Id8207
DescriptionError updating public folder with free-busy information on virtual machine %1. The error number is %2.
Event InformationExplanation :
Free/Busy Publishing was unable to update the Public Store with a users free/busy information.
Usually occurs if the Information Store service goes down or if the Public Store is down or offline. 
May also be caused by replication issues.
User Action :
Confirm that the Information Store service is running and that the Public Store is mounted. 
Investigate potential replication issues.
Reference Links "Error updating public folder with free-busy information" event appears in the application log in Exchange 2000 Server

Event 8207 Is Logged After You Remount the Public Information Store

repeatedly appears in the application log

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