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Lotus Notes, iCal, Google Apps – Calendar Interoperability Issues

There seems to be a strange issue with Apples iCal using a Google Apps backend when you try to accept or deny invitations sent from Lotus Notes.

The setup:

  • Calendar Client: iCal 4.0.4 on Mac OS 10.6.6
  • Server: Google Apps
  • Sync via CalDAV account in iCal

    • The problem:

  • Invitation sent from Lotus Notes comes with an ICS attachment
  • Invitation will be displayed in iCal
  • User changes status in iCal by accepting or denying the invitation
  • iCal tries to sync back the changes to Google Apps
  • after half a minute sync stops with the failure message shown above. The process CalDAVWriteEntityQueueableOperation receives the message „HTTP/1.1 500 Server error code: f52e483e“ from Google Apps
  • Status in iCal and in Google Apps stays open
  • Only way to accept or deny the invitation is to do it in Google Apps Calendar web frontend directly. This syncs correctly back to iCal.

    • It seems there are some users out there experiencing the same issues. But no one found a solution yet. So is anybody aware of that problem and knows how to fix it?


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