Skype for Business: Features, Architecture & Status

Skype for Business is a discontinued enterprise communication application used for instant messaging, audio and video calling, and online meetings. Originally part of the Microsoft 365 suite, it functioned as the professional counterpart to the consumer Skype app. Organizations used it to unify corporate communications within a secure, managed environment.

Concepts and Entities

• Skype for Business: Enterprise software used for instant messaging and videotelephony.
• Microsoft Teams: The cloud-based collaboration platform that succeeded Skype for Business.
• Microsoft Lync: The branding used for the platform between 2010 and 2015.
• Skype for Business Server: The on-premises version of the software that remains available via subscription.
• SIP (Session Initiation Protocol): The technical protocol used as the basis for client communication.
• PBX (Private Branch Exchange): A private telephone network used within a company, which this software can replace or enhance through the Phone System.
• Presence: A feature showing the real-time availability of contacts based on their Outlook calendar or current activity.

What is Skype for Business?

Skype for Business (formerly known as Microsoft Lync and Office Communicator) is an enterprise-grade tool for professional collaboration. While it shares branding with the consumer Skype app, the two platforms have almost nothing in common and function as separate services.

Microsoft released the platform to production as [Office Communicator 2007 on July 28, 2007] (Wikipedia). It later underwent several rebrands before its [retirement in favor of Microsoft Teams] (Microsoft). The software exists in two primary forms: * Skype for Business Online: A cloud-based service that was part of Microsoft 365. * Skype for Business Server: An on-premises version that provides secured, controlled communications on a company's own hardware.

Why Skype for Business matters

The platform provided a centralized hub for corporate interactions, allowing businesses to move away from fragmented communication tools.

• Scalable Meetings: Specifically designed for large-scale interactions, the platform supported [live events for up to 10,000 people] (Microsoft).
• Corporate Security: It uses TLS (Transport Layer Security) and SRTP (Secure Real-time Transport Protocol) to encrypt and secure signaling and media traffic.
• Presence Integration: Users can see when coworkers are busy or in meetings based on data from Microsoft Exchange.
• Cost Reduction: It allows businesses to replace traditional on-premises PBX with Phone System capabilities in the cloud.

How Skype for Business works

The software operates on the SIP protocol to manage communications between clients.

1. Deployment: Organizations choose between the cloud-based Online version or the locally hosted Server version.
2. Authentication: Users sign in using their work or school accounts, often tied to a local directory service like Microsoft Exchange.
3. Communication: Data travels through the Skype for Business Server. This keeps internal messages within the corporate intranet for increased security.
4. Collaboration: During sessions, participants can use Whiteboard documents for drawing, share their desktop screens, or present PowerPoint files.
5. Role Management: Meeting organizers can promote participants to "presenters" or demote them to "attendees" to control who can share content.

Best practices

• Plan for Migration: Since the [online version was retired on July 31, 2021] (Microsoft), users should migrate to Microsoft Teams immediately.
• Use FastTrack Resources: Apply Microsoft's FastTrack tools and best practices to ensure a smooth transition to Teams.
• Verify System Connectivity: Ensure your organization has validly licensed copies of Server or Microsoft 365, as the software will not function without them.
• Manage Modalities: Use meeting controls to mute or remove attendees to maintain order in large-scale video conferences.

Common mistakes

• Confusing Versions: Mistake: Assuming the consumer Skype app and Skype for Business are the same. Fix: Use Skype for Business for enterprise security and directory integration.
• Ignoring End-of-Life Dates: Mistake: Failing to upgrade from the Online version. Fix: Transition to Teams, as Skype for Business Online is no longer offered to new subscribers as of September 2019.
• Incomplete Provisioning: Mistake: Expecting immediate interoperability with consumer Skype users. Fix: Allow for provisioning time after connecting the two platforms for IM and audio.
• Mobile Client Assumptions: Mistake: Expecting the app to work on old mobile operating systems. Fix: Use Android 4.0 or greater, or iOS 8.0 or greater. Note that Windows Phone and Windows 10 Mobile apps were discontinued in May 2018.

Skype for Business vs. Microsoft Teams

FAQ

Is Skype for Business still available?

The Online version of the software is retired. For on-premises needs, Skype for Business Server is still available with a subscription license. However, Microsoft recommends all current users upgrade to Microsoft Teams for the latest chat, calling, and file-sharing capabilities.

What happened to Microsoft Lync?

Microsoft Lync was rebranded to Skype for Business in 2015. This was done to co-brand the enterprise service with the consumer Skype platform, though the underlying technology remained distinct from the consumer version.

Can I still use the mobile app?

The mobile app is available on the Google Play Store and Apple App Store for users with existing accounts. You must have a Skype for Business or Lync account to use the full features. Many organizations have stopped supporting these mobile clients in favor of the Teams mobile app.

How does the platform secure my data?

Communication takes place through a dedicated server, which can be kept within a corporate intranet. It uses industry-standard encryption protocols, including TLS for signaling and SRTP for media traffic, to prevent unauthorized access.

How many people can join a meeting?

Standard meetings vary by license, but the platform was designed to host live events for up to 10,000 participants. These events include features like desktop sharing, file uploading, and scheduling assistance.