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Event ID: 8241 Source: EXCDO

An existing appointment with the subject "<subject>" in mailbox <mailbox> was modified. The start time or both the duration and end time of the existing appointment were missing.
From a newsgroup post: "This is a known problem and it is an unfortunate result of scanning the M: drive using a file-level Antivirus software. The problem is really that items are changed when they are scanned. Because of that, the information store and/or Outlook client cannot read them properly anymore. There were two hotfixes that MS came out with to enable databases that were scanned like this to be seen again through Outlook properly:

1. Install Exchange 2000 SP2.
2. Install Outlook patch on your clients - Outlook 2000 and 2002

Articles related with this problem are ME302456, ME302849, and ME302852".

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