Forum Discussion
Problems with IM from Teams to SfB
There is something fishy going on here. We have a SfB solution in office 365. 1:Currently the Coexistence setting is Islands (decription reads: users can use both skype for business and teams ap...
Kenn Christensen I don't have a solution to your issue with external users but I would definitely suggest you to move away from Island mode and rather go for Skype for Business only and Teams only for all users (depending on if they want to use Skype or Teams). The Island mode is just so confusing and you get all sort of weird things happening and no one knows when to use what.