To maintain the single sign on principle when using Microsoft Office 365 in conjunction with The Voice of O365 a connection with Active Directory (Domain Controller) is required. With the help of this directory service, data about the user such as their name, email address, phone numbers, etc. are also assigned to Skype for Business. This allows the user to log in only once.
If an organization does not make use of an Active Directory, then we offer this a cloud service. A control panel provides the ability to add or delete users.