Unable to connect Skype for business online PowerShell after enable multi factor authentication.
I am able to conenct Exchange Online through connect-EXOPSSession and connect-msolservice.
Anyone can help me
You need enable modern auth for S4B. By default, it is OFF for S4B.
The SfB Online PowerShell module doesnt yet support Modern authentication afaik. At least I'm not able to find a version that does...
Hope this helps, if you haven't found this already :-