Skype is an application that you can use on a computer, mobile device, tablet, or even on the web. You can be signed in on all your devices at the same time. If you’d like to check your active sessions on Skype, follow this. Therefore, when you sign in to Skype with your Microsoft account, you might be prompted to verify it. Get more help with your Microsoft account. Learn how to add security info to your Microsoft account.
- This is a simple demo using a strictly Skype for Business Online deployment. Some minor prerequisites are needed, such as the latest version of the Skype for Business Online PowerShell Module, or at least version 7.0.1045.0 or higher (Download Link).
- Free conference meetings with up to 100 people powered by Skype. No sign ups or downloads required, simply generate your unique link and share it with all participants. Meet Now and enjoy easy-to-use conferencing by Skype.
With Office 365 Skype for Business Online and Azure ExpressRoute you can have true end to end QoS from your endpoint on the corp network to the cloud. Here are the marking Microsoft use for Skype for Business Online.
Can customers choose or change these DSCP markings or define port ranges?
No, these are globally set on Office 365, so they can’t be changed on a per customer or tenant level. If you have hybrid with SfB Server and want to keep your QoS uniform you could use the same recommendations
SfBO Client Port Ranges (can be marked for QoS just for internal SfB Calls even if not using ExpressRoute):
| Port | Protocol | Direction | Usage |
| 50000-50019 | RTP/UDP | Outbound | Audio |
| 50020-50039 | RTP/UDP | Outbound | Video |
| 50040-50059 | TCP | Outbound | Application sharing and file transfer |
Skype Verify Online
Client and server (Destination)
Skype Verify Online Services
| Purpose | Source IP | Destination IP | Source Port | Destination Port |
|---|---|---|---|---|
| Session Initiation Protocol (SIP) Signaling | Client | Office 365 | Ephemeral ports TCP | 443 TCP |
| Persistent Shared Object Model (PSOM) Web Conferencing | Client | Office 365 | Ephemeral ports TCP | 443 TCP |
| HTTPS downloads | Client | Office 365 | Ephemeral ports TCP | 443 TCP |
| Audio | Client | Office 365 | 50000 – 50019 UDP and TCP | 443 TCP, 3478 UDP, 50000 – 59999 UDP and TCP |
| Video | Client | Office 365 | 50020 – 50039 UDP and TCP | 443 TCP, 3478 UDP, 50000 – 59999 UDP and TCP |
| Desktop Sharing | Client | Office 365 | 50040 – 50059 UDP and TCP | 443 TCP, 50000 – 59999 TCP |
Online Skype Users
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