Skype for Business Online support in Outlook on the web

Outlook on the web (Outlook Web App) in Office 365 offers a basic Skype for Business web client from the navigation bar. This basic client is available for Online users whose admin hasn't configured a vanity URL for their Office 365 organization. As long as the user's account is online and doesn't have a vanity URL, they will still see the experience even if their organization has some user accounts that are homed on-premises. Users who have user accounts on-premises (whether they have a vanity URL or not) or are managed by Microsoft will see the Lync experience in the Outlook web app.

The following table summarizes the different setups that you may have and the web client that is used.

User account is located
Vanity URL is configured or there is a dedicated organization
Skype for Business or Lync Experience?
Online
No
Skype for Business web experience
Online
Yes
Lync web experience
Hybrid but homed online
No
Skype for Business web experience
Hybrid but homed online
Yes
Lync web experience
Hybrid but homed on prem
No
Lync web experience
Hybrid but homed on prem
Yes
Lync web experience
Pure on prem
No
Lync web experience
Pure on prem
Yes
Lync web experience

Set up Skype for Business Online

Let Skype for Business users add Skype contacts