All hosted exchange mail accounts will have Outlook Web access already enabled on their mailbox account. This means you can access your hosted exchange mail anywhere in the world, without having to use an Outlook client. OWA gives you access to a web-based version of Outlook 2007, allowing you to configure features such as Out of Office and signatures. Note: In order to have full access to the same features as Outlook, you will need to load OWA in Internet Explorer. OWA will work on other web browsers like Firefox, but you will only get limited features. 

You can find a user guide and FAQ on Outlook Web Access at: http://www.outlook-web-access.com/owa-2007-user-guide

To access your hosted exchange using Outlook Web Access, please do the following: 

Go to the web link: https://mail.msexchange2007.com/owa - the login screen is shown as below:



Next enter your e-mail address and password, this is the same as your outlook credentials then click Log On

OWA will then load up your Hosted Exchange mailbox