1. Open the Outlook app

• Open Outlook on your iPhone.

2. Open Settings

• Tap your profile icon (top-left).

• Tap the gear icon (⚙️ Settings).

3. Go to Mail Accounts

• Tap Mail Accounts.

4. Add Shared Mailbox

• Tap Add Shared Mailbox.

5. Enter the shared mailbox address

• Enter the email address of the shared mailbox
  
  (example:support@company.com)
  .

• Tap Add Account.