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Event ID: 8263 Source: EXCDO

Source
Level
Description
The recurring appointment expansion in mailbox <mailbox> has taken too long. Some recurring appointment instances may not be visible at this time. To ensure that the calendar view is correct, please refresh the calendar view in Microsoft Outlook Web Access.
Comments
 
From a newsgroup post: "These entries are completely harmless. They indicate that a user has too many appointments in the calendar view to be expanded in a single OWA calendar query. If the user sees missing items in the calendar view, he/she can simply press the refresh button on the browser, and then the expansion starts where it left off and produces more instances for the view".

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