This article explains how to change your sender name.
Please open the following website at webmail.uni-ak.ac.at and log in with your p-/s-number.
Then click on “Settings” and “Identities“
Please pay attention to upper and lower case letters when registering for the webmail. The username ALWAYS starts with a lowercase “p” or “s”. When using a “P” / “S”, an error message appears when sending messages.