Hi Morten,
I'm sorry, but in order to help you, I need more particular information. Please let me know the version of Outlook you are running and if it is part of a cloud-based email service like Microsoft 365 or Office 365 or an on-premises Exchange server.
Can you also please let me know what steps you have tried thus far and where you are having trouble? This will enable me to better comprehend the problem and offer support that is more specifically directed.
Example:
The following procedures can be used to enable Outlook on the web in Microsoft 365 E5 Developer to always display the "From" field globally for all users:
- Login with your administrator account to the Microsoft 365 admin center.
- Choose "Exchange" under "Admin centers" by clicking.
- Choose "Outlook Web App policies" under "Permissions" in the Exchange admin center.
- Next to the default policy, click the "Edit" icon (a pencil).
- Choose "Email" from the "Default OWA Policy" tab.
- Under the "Message format" section, scroll down and choose the "Always show from" checkbox.
- To save the changes, click "Save."
If you cannot access the Exchange admin center or the Outlook web app policies, you may not have the appropriate rights to make changes at the organizational level. You must be a member of the organization's Exchange administrator role group to activate the "From" field for all users globally.
Warm Regards,
Janbaz