exchange 2007 outlook 2007 keeps asking password

[Breckon]

I am using SBS 2008 and clients are with Outlook 2007. If I am trying to connect the client to the exchange then it opens outlook and keeps asking for the password. I am able to see the mailbox but the login box popups everytime. How am I suppose to end this? Also, if I am trying to add the user and the exchange settings manually then I am getting the same popup. Please help.

[Dr.pter]

You can try to install Exchange 2007 update rollup 9, at a minimum but Exchange 2007 Service Pack 3 is also out, so you can try to get it asap.

[Breckon]

Thank you for the help, I have installed the SBS 2008 for the first time and so I still have to research for it right now. I will try to install the Service Pack 3 and see if that works. By the way, this update comes with auto update or so?