Configuración de preferencias y opciones en Outlook en la Web para empresas
Dear Manel Gangolells,
I appreciate you bringing this concern to the Microsoft Community Forum.
According to your description, you're having trouble sending emails on behalf of the alias configured for the mailbox.
Here are some steps you can take to resolve or minimize the issue.
In Outlook Web App:
1. Click the gear icon at the upper-right corner of the page.2. Then click View all Outlook settings at the bottom.
3. Select Mail > Compose and reply, then find Message format and check the option Always show From, then save the changes.
If above step doesn't work, kindly contact admin to send emails from alias, please kindly ask your admin within your organization for help:
- Open the Exchange Admin Center
- ClickSettings > Mail flow
- Enable Turn on sending from aliases
I hope it will be fixed. If the issue persists, please send me the screenshot.
Thank you for your precious time and kind understanding.
Greetings
Jade - MSFT | Microsoft Community Support Specialist