I'd like to include a hyperlink that opens a chat with a Skype for Business account in normal Skype. This is possible for Skype normal to Skype normal or Skype for Business to Skype for Business, but I can't find a solution for Skype normal to Skype for Business.
This is similar to openUrl / URI to a Skype For Business account
Using the normal URI scheme skype:[email]?chat won't work. It will create a new chat in Skype normal named after the email address but messages can't go through.
Adding the normal Skype user in Skype for Business will create a chat named alike (exactly the email address) which works.
However, even with that chat working, the URI scheme will always open a separate chat which doesn't work.
Ideally a chat window in Skype normal would open and messages could successfully be send to Skype for Business.