We ran into this same issue whilst also discovering some insane calendaring 
practices in some of the offices on campus. We found users who had 40+ people 
sharing/updating their calendar and other users who “needed” to monitor 50+ 
calendars. We also found some users (often users in leadership positions) that 
used secretaries as their free/busy tool (i.e. they would have the secretaries 
do a conference call to pick a meeting time and then all of them would 
individually add it to their boss’ calendar). Crazy stuff.

In any event, the solution for us is to have users put their personal mailbox 
in cached mode but leave the shared mailboxes in online mode.

-jim

James Rupprecht 
Senior Systems Specialist       
Microsoft Exchange & Active Directory Administrator     
University of Kansas Information Technology     





From: Damien Solodow [mailto:damien.solo...@harrison.edu] 
Sent: Monday, August 22, 2011 10:45 AM
To: MS-Exchange Admin Issues
Subject: Outlook cached mode & shared calendars

I’ve got a number of users reporting issues with delegate calendars being out 
of date. For example, user Bob has Editor access to the Calendars of John and 
Sue. 
Bob selects those Calendars in Outlook  (since he’s used them before they’re 
under Shared Calendars) and they display, but purportedly the information in 
them is inaccurate and out of date. 

In most of the cases I’ve seen, if I select the shared Calendar and tell 
Outlook to “Update this Folder” it refreshes with new data. What I’m trying to 
sort out is why Outlook isn’t keeping that folder refreshed automatically. 

The servers are Exchange 2010 SP1 RU4 rev2, and the clients are XP with a mix 
of Outlook 2007 SP2 and Outlook 2010. 
Outlook is configured to use Cached Mode, and “download Shared Folders” is 
enabled. Outlook is set to “Download Full Items” but “On Slow Connections only 
download headers” is enabled as well.

I’m continuing to dig, but was hoping someone had encountered this and had a 
solution to share to save me some hair. ☺
TIA

DAMIEN SOLODOW
Systems Engineer
317.447.6033 (office)
317.447.6014 (fax)
HARRISON COLLEGE
500 North Meridian St
Suite 500
Indianapolis, IN 46204-1213
www.harrison.edu

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