Use the latest version of Thunderbird.
- Install this plugin: addons.thunderbird.net/en-US/thunderbird/addon/tbsync/
- After installation, open the plugin Settings.
- Add a new account: Exchange Active Sync:
- Install the shown plugin
- Open again Settings and add a new account:
Choose "Automatic configuration" and name the account.
Username and password are the same as for your AAU-email account.
Open "Autodiscover settings" and choose "Enable" in the next window.
- You will se a list of items to synchronize. Choose "calendar" and remember to select how often you wish to synchronize. 5-10 min should fix.