Shared Calendar "operation failed"
 

We are running Outlook 2003 / XP Pro SP2 / Exchange Server 2003 SP1 /
Windows Server 2003

One of our users is unable to "Label" appointments for any of her
assigNments. When she tries to apply the "Must Attend" or other color
coding label to the appointment, she gets "Operation Failed."

I thought it might be that you can't label appointments in a shared
calendar, but I got one of my co-workers to give me access to his
calendar with editor rights and I was able to label entries on his
calendar.

So ... any ideas? I searched support.microsoft.com. No luck.

Thank you!!!