on a users Mailbox I have the following problem:

If he wants to answer a mail received in groupwise mailbox and clicks on reply button - there opens a simple mail (without receipients).

Problem onliy occurs on this user - also on other machine with gw-client.
If another user tries it on same machine - all works well.

I also tried to repair the users mailbox - but nothing changes.
In Knowledgebase I cant find something helpfull yet.

Do I have to rebuild users mailbox or what other things could help to solve this problem.