Outlook 2000 Calendar Problem

[Superbobu2]

We just changed over to the Corp exchange server. Thus we had to change all employees outlook settings and setup a new profile pointing to the new exchange server. We did an import of all the old emails and contacts and calendar entries from old email profile to new. Problem is the old email profile was first name last initial, now the new profile is first initial last name. So instead of SteveT its now SThomas. So everythign seems to be workign but when SThomas tries to change one of his calendar entries and resend it says he does not have permission. Obviously only the owner can do it but he is the owner. How can we fix this? Is there a fix? I tried giving his account specific ownership to his calendar but that does not supersede his previous settings for old calendar entries. Can ownership be transferred to new acct? I have Email admin rights.

Thanks