Provide a mechanism in Skype for Business to allow external users to utilize the call ID to join a screen sharing session. GTM has this.
Trying to get GTM users to move to Skype for Business and one of their principal issues is having to wait for an emailed URL to reach the party they want to do an impromptu meeting with -- for doing support with our customers. GTM provides a integer or ID that can be verbally passed to the other party and entered on a webpage to hook the two parties together to screen share. Hoping Skype for Business will allow similar in the future so I can sway my users to move to Skype for Business.