The manual has been created on Windows 11 with Windows Mail version: 16005.14326.20970.0

To configure your mail account, please choose Add account under Accounts

Choose advanced settings (Erweitertes Setup on the screenshot)...

...and Exchange ActiveSync as an account type.

Enter your data:

• E-mail address: firstname.lastname@rwth-aachen.de or lastname@sampleinstitute.rwth-aachen.de
• Password for your RWTH-E-Mail Account
• Username of your RWTH-E-Mail Account (e.g.: ab123456@rwth-aachen.de oder ab123456@sampleinstitute.rwth-aachen.de)
• Domain: can stay empty  
• Server: mail.rwth-aachen.de
• Account name of your choice

and click Sign In.

The account has been set up.