This is my new favourite Outlook Web Access email experience!

  1. Find an email from a colleague in “Junk E-Mail”
  2. Open the email
  3. Click “Not Junk”
  4. Confirm you want to add your coleague to “Safe Senders”

You’ll be told:

The email address for the sender ([SENDER]) is internal to your organisation and cannot be added to the Safe Senders list. Email from senders in your organisation will never be treated as junk email.

I suppose never is more a guideline than an actual rule.