Ability to request invitation from Skype users
I have been using Skype for Business over 2 years. I have tested that, outside of our community, specially Skype users cannot request our Skype for Business users to accept or add for communications.
Skype for Business users when add someone into their list, outsiders can communicate with them. But, no outsiders/ Skype users cannot send for accept. Although, the message shows that request sent but never received the add request into my Skype for Business at all.