Unable to create tasks in Outlook

[LaforcE]

Everything was fine. The day after, the user is unable to create a task. She told the last thing she done was exporting some folder in a PST. (Maybe NOT related) Now she is unable to add any task in her task folder. We can see the old one, but can't add any. We are having the error : Unable to complete task, some parameters or incorrect or missing (or something like that, im sorry the error is in French)

Troubleshooting done:

- She long on another workstation with her user : same problem.

- When she log on using OWA, she's able to add any task, everything is fine.

- From MY user, I open her task (via outlook sharing) and I have the same problem that she's having ...

- It's not logging any error in the Event log

Any ideas are welcome ...
I'm screwed up !!

Thanks guyz!

- Security is a never ending job.

 

[urosg]

I have the same problem in exchange 5.5, the problem was that the mailbox was corupted. Try to create new mailbox
but don`t copy tasks folder from old mailbox.
uros