Exmerge appointments do not import correctly and/or problem opening appointments

[Arch Willingham]

One of our users can't open any of his appointments as they pop up on the
screen (Office 2000). When they attempt to open many of their appointments
in their Outlook Calendars, they get messages like "Unable to open this
item." "The end date you entered occurs before the start date", etc

As background, I used exmerge to export and later import a bunch of users
mailboxes (Exchange 2000). On one user, I get lots of the following errors
similar to the following two:

Event Type: Error
Event Source: EXCDO
Event Category: General
Event ID: 8206
Date: 04/19/2004
Time: 11:46:33 AM
User: N/A
Computer: TRUCK
Description:

Calendaring agent failed with error code 0x80040229 while saving
appointment.

For more information, click http://www.microsoft.com/contentredirect.asp.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.

Data:

0000: 48 72 53 61 76 69 6e 67 HrSaving
0008: 41 70 70 74 3a 3a 48 72 Appt::Hr
0010: 43 68 65 63 6b 50 61 74 CheckPat
0018: 74 65 72 6e 20 66 61 69 tern fai
0020: 6c 65 64 2e 20 4d 61 69 led. Mai
0028: 6c 62 6f 78 3a 6a 65 66 lbox:

Event Type: Error
Event Source: EXCDO
Event Category: General
Event ID: 8239
Date: 04/19/2004
Time: 11:46:33 AM
User: N/A
Computer: TRUCK
Description:

An appointment with the subject "Dad's B-Day" was saved to mailbox
(e-mail address removed). The start time is missing, so the calendaring agent
cannot publish the free/busy information for this appointment. To correct
this, please delete the appointment and recreate it.


I have tried starting up Outlook with /CleanFreeBusy and /CleanReminders but
that did not work.

Any ideas?

Arch