I am using LyncClient library to sign-in into SfB through my C# application.
I am using two different office 365 accounts to login into SfB. It works fine for one account while it doesn't work for other account ( this account is using domain created on office 365 account itself).
The problem with second account is though I am providing username & password in BeginSignIn (LyncClient) the another window is popped up for asking password again.
Edit - Can someone please confirm if the stated issue have to do with the value of "ClientAdalAuthOverride".
ClientAdalAuthOverride - Allowed - Popup window for password