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Home » Kerio User Forums » Kerio Connect » Delegated calendar events not updating/appearing in iCal (Users in iCal that were formally receiving updates from a delegated calendars are no longer working)

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Kerio Server: 6.7.1
End users: OS X 10.5.8

At least 2 users who were delegated as readers for another user's calendar stopped receiving calendar updates recently. They can still see the delegated calendar in the iCal sidebar and it does not give any error message when refreshing.

The calendar does get updated information within the Kerio webmail interface, but the events never make it into iCal.

Steps taken so far:

• Deleting the user account from within iCal and reconfiguring
• Toggling user permissions for the source calendar from within iCal and Kerio's webmail
• Configuring reader accounts on other systems, including 10.5.7 and 10.5.8 OS versions.
• Creating another calendar and adding a test appointment within the source user's account (from webmail) works correctly in iCal in cursory testing.

I found this in the Kerio error log:
16/Sep/2009 11:34:03] mail_folder.cpp: Index error in folder ~xxxxx<_a.t_> Cannot parse calendar message file 0000053b.eml

Looking around the mail store on the server, I cannot find that referenced .eml file (and I know Kerio discourages altering any of those files directly in most cases, but I only wanted to look around Twisted Evil )

Moving this user's calendar events to the new calendar would be disruptive, but not the end of the world. Our preference would be figure out why the original isn't working.


Shawn Punga
Senior Systems Consultant


Shawn Punga
Senior Systems Consultant

Pavel Dobry (Kerio)

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This is probably an unfortunate issue with iCal and CalDAV. It appears the iCal is able to write certain calendar events in incorrect format but it can't display them when reading the same events from the server. This issue happens only with delegated calendars.
I recommend to contact our technical support at They will help you to find and fix events with incorrect format.
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