Verify Send As / Send on Behalf Permissions

Before enabling the "From" field, ensure the user has the correct permissions:

• Send As – Allows the user to send emails as the mailbox owner.
• Send on Behalf – Allows the user to send emails on behalf of another mailbox.

If permissions are not granted, follow the "Assigning Delegation on Admin Exchange" https://coreservices.happyfox.com/staff/kb/articles/47 to configure them.

Enable the "From" Field in Outlook (Desktop App)

1. Open Microsoft Outlook.
2. Click on New Email.
3. In the new email window:
   • Click Options (on the ribbon).
   • Click From (this enables the "From" field).
4. The From field will now be visible in all new email messages.

Select an Alternate "From" Address

1. Click on From in the new email.
2. If the desired email address is not listed:
   • Click Other Email Address…
   • 
   • In the Send From Other Email Address window, enter the email address.
   • 
   • Click OK.
3. Compose the email and send it.