Instructions
To change the sender address in Outlook (e.g. to send mails via delegated accounts or shared mailboxes), first open a new mail in your Outlook client.
Then open the "Options" tab in the mail window and activate "From" under "Show fields" to display the sender.
Now click on "From" in the mail draft to display the list of existing senders. You can select a sender here or, if the desired address does not yet exist, add a new sender via "Other e-mail address...".
Finally, enter the corresponding address in the field and confirm with "OK".
You can now send mails from this address. This setting is usually saved, so you do not have to make it again the next time you send an e-mail.
