Following on from a earlier question, where I'm using outlook 2007 with exchange 2003 and i can receive and send mail but if I try to reply or forward a mail I get the error you do not have permission to send as this user. I have looked through outlook and I have noticed that i do not have an outlook.osf file. How can I re create one
The OST's an offline folder file.
You can choose to use Cached Exchange mode or setup Offline Folders and it should create one for you.
hope this helps