R2 not working as expected with PIC and EASI domains

Morten sent a question via the comments about a problem with R2 and trying to add PIC users with EASI domains. Turns out one of the customers in our R2 technology adoption program (TAP) reported this with the failing steps and the workaround

  1. Start Communicator
  2. Go to Tools - Add a Contact
  3. Enter a PIC sign-in name with format [user]([domain])@msn.com

Result: a message appears saying 'Address is not valid'

  1. Enter a PIC sign-in name with format [user]([domain])@msn.com in the search field
  2. Right click the resulting item right below the search field and select Add to Contact list

Result: the PIC contact gets added to the Contact list.