The mailboxes for students are on the mailbox-server. In the mailbox-interface you can set up redirection, auto-responses and signatures. The easiest way to write and administer your mails is the Roundcube-Webmail-Interface.
The mailboxes for most employees are on the Exchange-Server. With this you can use Groupware-Features (e.g. setting up a calendar). The easiest way to write and administer these mails is the OWA-interface.
sciebo is a statewide cloud service that offers free and secure online space to all students and employees of the university for data saving purposes. After signing up you can log into the web-interface with your login-ID and sciebo-password.
You can use the content management system Imperia for free to create websites in the university‘s corporate-design. To use Imperia you need to participate in an Imperia course to get clearance. Imperia is not bound to any platform.