Susan Bradley | 24 Sep 00:25 2013

After the install of KB2794707 - Outlook 2010 Event 27

After the install of KB2794707 - Outlook 2010

Your application event logs may be filled with

Log Name:      Application
Source:        Outlook
Date:          9/23/2013 1:25:23 PM
Event ID:      27
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      Computername
Calendar Folder property is missing
Event Xml:
<Event xmlns="">
     <Provider Name="Outlook" />
     <EventID Qualifiers="16384">27</EventID>
     <TimeCreated SystemTime="2013-09-23T20:25:23.000000000Z" />
     <Security />
     <Data>Calendar Folder property is missing</Data>

This is also introduced by sp2 - see

It appears to be due to:

"We have found that this error relates to shared calendars in 
Outlook.The more shared calendars you have, the more errors. Also, the 
errors are generated each time you LEAVE your calendar view. If you 
watch the event log, you'll see that visiting the calendar view does not 
cause the errors, but as soon as you switch back to your inbox, the 
errors are generated."

I have opened case 113092310807302 and they indicate it's a known 
issue.  There's nothing yet in the KB indicating that this should be 

I'll keep you posted.