MultiLine for Intune says I need to install Company Portal, but I already have it?

If you already installed Company Portal, but MultiLine for Intune has an error message saying that you need to install it, you need to enable it:

Enable Intune Company Portal

  1. Click the link to Go to Store
  2. Click the Enable button. 
  3. When the Enable button changes to Open, go back to the MultiLine for Intune app and try starting again.