In an Audio Conferencing Providers (ACP) conference in Microsoft Skype for Business 2016, when you try to add a user by selecting the Skype Call option in the call, you receive an error message that states that "The user cannot be reached."


To fix this issue, install the June 4, 2019, update (KB4464576) for Microsoft Skype for Business 2016.

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

What affected your experience?

Thank you for your feedback!