By configuring web publishing for your calendar, you can allow people to view the calendar simply by clicking a web link, or by subscribing to the shared calender using the iCal protocol.
You can manage web publishing settings for the Calendar using Outlook Web App. To manage these settings, your mailbox needs to be on Exchange 2010.
After login to Outlook Web App via https://mail.aston.ac.uk, Click on Calendar on the left hand menu to display the calendar:
To manage web publishing settings, select the Share menu.
From the Share menu, select Change Publishing Settings. The Calendar Publishing window will appear.
From this window, you can change the detail that is published, the date range to publish, whether to use simple "public" links, or complicated "restricted" links. You can copy the links to the clipboard, to paste into an email, and disable the web publishing feature by choosing "Stop Publishing":