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Summary: IT Professionals should review the support requirements for the Skype for Business Web App and Skype Meetings App while planning for Skype for Business Server. This article is not intended for the users of these apps.
Once you've implemented Skype for Business Server, your organization's users will presumably have the Skype for Business client installed as part of the deployment process.
Later on, those users may create meetings and invite users from outside the organization, and those meeting invitees may not have any version of the Skype for Business client. When those users click the URL for the meeting invite, the lack of a client will be detected and the invitee without a Skype for Business client will be asked to download and install a lightweight, meetings-only client so they can join the meeting.
Note
The Skype for Business Web App and Skype Meetings App are only available when trying to log in to a meeting without having Skype for Business. User help for these apps is at https://aka.ms/smahelp.
Download Skype for Business and enjoy it on your iPhone, iPad, and iPod touch. Skype for Business, formerly Lync 2013 for iOS, extends the power of Lync and Skype to your favorite mobile device: voice & video over wireless, rich presence, instant messaging, conferencing, and calling features from a single, easy-to-use interface. Download Skype for Business across all your devices Connect with your team anywhere using clients across Windows, Mac, iOS, and Android™, or bring remote participants into meeting spaces of all sizes with Skype for Business. Windows Skype for Business 2015 client: 15.0.4893.1000 Windows Skype for Business 2016 client: 16.0.4483.1000 Windows Skype for Business 2016 (Office 365 version) 16.0.6965.2117 Skype for Business for Mac client: 16.23.64.
Note
You can't pre-install either the Skype for Business Web App or Skype Meetings App, but smart phone and tablet users may be able to install inexpensive mobile clients they can use to attend meetings.
By default, the server hosting the meeting will direct the user to download and install Skype for Business Web App to join the meeting. The Skype for Business Web App is stored on the Front End Server and gets sent to the meeting attendee.
For Skype for Business Server, Skype Meetings App (on Windows) and Skype for Business for Mac (on Mac) are available as replacements for Skype for Business Web App beginning with CU5, but providing the replacement apps requires the additional configuration described in Enable Skype Meetings App to replace Skype for Business Web App (Optional). If Skype Meetings App and Skype for Business for Mac are enabled, users will download the latest version of the apps from the Microsoft 365 or Office 365 Content Delivery Network (CDN) rather than from your Skype for Business server. For Skype for Business Server 2019, using Skype Meetings App and Skype for Business for Mac is the only option.
Skype Meetings App offers a simplified browser experience for downloading and installing the app and joining meetings, including one-click join for users of Internet Explorer. Skype Meetings App also has many improvements over the Skype for Business Web App for reliability and the meeting experience.
Note
As of Skype for Business Server 2015 CU5 or later, meetings held using Skype for Business Online will no longer send a clientless user the Skype for Business Web App, they will instead be sent Skype Meetings App (on Windows) or Skype for Business for Mac (on Mac). As of Skype for Business Server 2015 CU5 or later, if you Enable Skype Meetings App to replace Skype for Business Web App (Optional), clientless users will be sent Skype Meetings App or Skype for Business for Mac instead of Skype for Business Web App.
Software requirements
To use the Skype for Business Web App, a user must have one of the following supported operating system and browser combinations.
Operating System and minimum browser support for Skype for Business Web App
| Operating system | Edge | 32- and 64-bit Internet Explorer 11 or later | 32- and 64-bit Internet Explorer 10 or later | 32- and 64-bit Internet Explorer 9 or later | 32- and 64-bit Version of Safari 6.2.8 - 11.X | 32- and 64-bit Version of Chrome 18.X or later |
|---|---|---|---|---|---|---|
| Windows 10 | Yes | Yes | N/A | N/A | N/A | Yes ❸ |
| Windows 8.1 ❶ | N/A | Yes | N/A | N/A | N/A | Yes ❸ |
| Windows 8 (Intel based) ❶ | N/A | N/A | Yes | N/A | N/A | Yes ❸ |
| Windows 7 with SP1 ❷ | N/A | Yes | No | No | N/A | Yes ❸ |
| Windows Server 2008 R2 with SP1 ❷ | N/A | Yes | Yes | Yes | N/A | Yes ❸ |
| macOS 10.8 and later (Intel-based) ❷ | N/A | N/A | N/A | N/A | Yes | Yes |
Skype For Business Mac Issues
❶ The Skype for Business Web App browser plug-in requires a specific sharing plugin to use computer-based voice, video, sharing, and viewing of ongoing screen sharing and other features. A meeting attendee is given the option to install the sharing plug-in either when they join the meeting or when they initiate one of these features. On Windows 8, and Windows 8.1, the sharing plug-in can be installed only if you're running Internet Explorer 10 or Internet Explorer 11 for the desktop. These features are not available with non-desktop versions of Internet Explorer 10 and 11. Note that Firefox and Safari version 12.0 and later is no longer supported.
❷ On supported Windows 7, Windows Server 2008 R2, and Macintosh operating systems, all features are available including computer-based voice, video, application viewing, application sharing, desktop viewing, and desktop sharing. To use these features, you must install a plug-in when prompted. Note that Mac OS X version 10.7 is no longer supported. Also note the web app will not install on OS X 10.15 or later. We recommend using the latest version of Skype for Business for Mac which supports anonymous join scenarios moving forward.
❸ Accessing the Web App from Chrome on Windows will launch a small program which loads the Web App in an embedded Internet Explorer frame. This program requires one of the supported versions of Internet Explorer be installed for the Web App to load properly.
Note
Microsoft 365 and Office 365 users can use Internet Explorer 10 or later with Skype for Business.
Skype Meetings App
Skype Meetings App runs as an app on computers using Windows 10, Windows 8.1, Windows 8, Windows 7, with 32- and 64-bit Internet Explorer 11 or later installed.
For any other dependencies, refer to Supported platforms for Skype Meetings App
Skype for Business for Mac
Skype for Business for Mac runs on computers using macOS version 10.8 or later.
Hardware requirements
Computer hardware requirements are determined by the operating system and browser. Voice and telephony features require a microphone and speakers, headset with microphone, or equivalent device compatible with the computer. Video features require a video device compatible with the computer. For detailed information about video hardware support and expected video quality, see Skype for Business client video resolutions.
Network requirements
If a user of Skype for Business Web App or Skype Meetings App experiences meeting connection issues, chances are their organization's network infrastructure is not configured to support Office 365 as described in Office 365 URLs and IP address ranges. This is the case whether the meeting was created by a user of Skype for Business Online or Skype for Business Server.
If the user is on a network not configured as described, many app features may or may not work and they may not be able to connect to the meeting at all.
Supported Meetings features
This table compares the Meetings features available to users of the Skype for Business client, Skype for Business Web App, Skype Meetings App, and Lync Web App. Lync Web App is listed for feature comparison purposes: a user would only be downloading and using Lync Web App if the meeting was hosted on a Lync 2013 server.
| Feature/capability | Skype for Business 2016 or 2019 client | Skype for Business on Mac client | Skype Meetings App | Skype for Business Web App | Lync Web App |
|---|---|---|---|---|---|
| Add computer audio | ✔ | ✔ | ✔ (requires plug-in) | ✔ (requires plug-in) | ✔ (requires plug-in) |
| Add video | ✔ | ✔ | ✔ (requires plug-in) | ✔ (requires plug-in) | ✔ (requires plug-in) |
| Switch audio to a phone for authenticated participants | ✔ | ✔ | ✔ | ✔ | ✔ |
| Switch audio to a phone for guest participants | ✔ | ✔ | ✔ | ||
| View multiparty video (gallery view) | ✔ | ✔ | ✔ | ✔ | ✔ |
| Video-based screen sharing | ✔ | ✔ | ✔(View-only) | ||
| Use in-meeting presenter controls | ✔ | ✔ | ✔ | ✔ | ✔ |
| Access detailed meeting roster | ✔ | ✔ | ✔ | ✔ | ✔ |
| Participate in multiparty IM | ✔ | ✔ | ✔ | ✔ | ✔ |
| Set IM messages as high importance | ✔ | ||||
| Share the desktop (if enabled) | ✔ | ✔ | ✔ (requires plug-in) | ✔ (requires plug-in) | ✔ (requires plug-in) |
| Share a program (if enabled) | ✔ | ✔(On Windows only; requires plug-in) | ✔(On Windows only; requires plug-in) | ✔(On Windows only; requires plug-in) | |
| Take control of another user's shared desktop or program | ✔ | ✔ (❶ On Windows only; requires plug-in) | ✔ (❶ On Windows only; requires plug-in) | ✔ (❶ On Windows only; requires plug-in) | |
| Let another user take control of your shared desktop or program | ✔ | ||||
| Add anonymous participants (if enabled) | ✔ | ✔ | ✔ | ✔ | ✔ |
| Invite participants by name | ✔ | ✔ | |||
| Invite participants by phone number | ✔ | ✔ | ✔ | ✔ | ✔ |
| Invite participants by email | ✔ | ✔ | ✔ | ✔ | |
| Use dial-in audio meetings | ✔ ❷ | ✔ ❷ | ✔ ❷ | ✔ ❷ | ✔ ❷ |
| Initiate a Meet Now meeting | ✔ | ✔ | |||
| Record a meeting | ✔ | ||||
| Add and download attachments | ✔ | ✔ | ✔ | ✔ | |
| Add and present Microsoft PowerPoint files | ✔ | ✔ | ✔ | ✔ | ✔ |
| Navigate Microsoft PowerPoint files | ✔ | ✔ | ✔ | ✔ | ✔ |
| Add and edit OneNote meeting notes | ✔ | Edit only (not add) | Edit only (not add) | Edit only (not add) | |
| Use a whiteboard | ✔ | ✔ | ✔ | ✔ | |
| Conduct polls | ✔ | ✔ | ✔ | ✔ | |
| Upload files to share with others | ✔ | ✔ | ✔ | ✔ | |
| Schedule a meeting or conference | Outlook or Skype for Business Web Scheduler | Outlook or Skype for Business Web Scheduler | Skype for Business Web Scheduler | Skype for Business Web Scheduler | Skype for Business Web Scheduler |
| Q&A Manager | ✔ | ✔ | ✔ | ✔ | |
| Disable attendee video | ✔ | ||||
| Disable meeting IM | ✔ | ✔ | ✔ | ✔ | |
| Mute audience | ✔ | ✔ | ✔ | ✔ | ✔ |
| Make everyone an attendee | ✔ | ||||
| Produce Skype Meeting Broadcast | ✔ |
❶ Participants can't control desktops that are shared by Skype for Business for Mac, Lync for Mac 2011 or Communicator for Mac 2011 users. This also won't work for Skype for Business Web App on Max OSX.
❷ For Skype for Business Online, this feature requires Microsoft PSTN Conferencing, Exchange Unified Messaging, or a 3rd party audio conferencing provider.
❸ The Lync for Mac 2011 client cannot view Microsoft Office 2013 PowerPoint presentations when they have been shared in a conference by the Skype for Business Web App.
Known issues and troubleshooting
For End-users, the online help for these apps is readily available. IT Professionals should be aware of the following issues:
If the user is on a network not configured to meet the Network requirements, many app features may or may not work and they may not be able to connect to the meeting at all.
Some users may have corporate-administered computers with disabled permission to install apps. for those users, neither app is an option, but smart phone and tablet users may be able to install inexpensive mobile clients they can use to attend meetings.
Other installation issues are also covered in the help topics.
Users may see a firewall warning the first time they run the meetings app. They may be prompted to open ports to optimize the experience, and this may require Admin privileges on the machine they may not have. The app should still function and the user can safely decline to open the requested ports.
You must have ActiveX enabled without filtering in Internet Explorer, even if IE is not your default browser. In Skype for Business Web App, an ActiveX control—a small module that adds additional features to a web app or other program—is required for audio, video, and screen sharing.
For some features of Skype for Business Web App to work correctly, you must allow your browser to save cookies on your computer or device.
You may need to turn on JavaScript support in your browser for some Skype for Business Web App features to work as expected.
AES Support
As of Skype for Business Server 2015 CU5, AES is not supported for ASP.NET 4.6 and this may cause Skype Meetings App to fail to start. Cryptographic requirements due to ASP .NET 4.5 has more details.
See also
Topics Map > Communication and Collaboration > Lync / Skype for Business
This page describes the minimum versions of Lync and Skype for Business that can connect to the campus Skype for Business servers.
If the Lync or Skype for Business client on your computer does not meet the minimum version requirement, the campus Skype for Business servers may give you warnings or deny you the ability to log in. If you need assistance with the update process, please contact your local IT Professional or contact the Help Desk (217-244-7000).
What are the minimum supported Lync and Skype for Business client versions?
As of April 5, 2019:
| Client | Minimum version |
|---|---|
| Windows Lync 2010 client | 4.0.7577.4521 |
| Windows Skype for Business 2015 client | 15.0.4893.1000 |
| Windows Skype for Business 2016 client | 16.0.4483.1000 |
| Windows Skype for Business 2016 (Office 365 version) | 16.0.6965.2117 |
| Skype for Business for Mac client | 16.23.64 |
Note: A fresh install of the Skype for Business or Lync client will need updates in order to get to the minimum version. Please run Windows Update or Office Update to install any relevant patches.
How do I check if I am running at least the minimum client version?
NOTE: There is an issue with displaying the correct version number in the Skype for Business versions of the Windows client. If you are receiving a message stating that your version is out of date, please follow the steps listed under 'How do I upgrade if I am below the minimum client version?' below. If you need further assistance, please contact your local IT Professional or contact the Help Desk (217-244-7000).- Skype for Business 2015/2016 (non-O365) client on Windows
- Click the arrow next to the configuration gear on the Skype for Business window.
- Click Help.
- Click About Skype for Business.
- Check the version number in the 'About Skype for Business' window that appears.
Skype For Business Mac Version 15 Download Full
- Skype for Business 2016 client Office 365 version) on Windows
This version should receive automatic updates from Office 365. If your client does NOT auto update, please see this article Skype for Business, Updating Skype for Business Office 365 Versions for steps on how to force the update for your client.
- Click the arrow next to the configuration gear on the Lync 2010 window.
- Click Help.
- Click About Microsoft Lync.
- Check the version number in the 'About Microsoft Lync' window that appears.
How do I upgrade if I am below the minimum client version?
- How to update Lync 2010 or Skype for Business 2015/2016 (non-O365 version) on Windows:
- On Windows 7
- Click the Start button.
- In the search box, enter Update, and then, in the list of results select Windows Update
- In the left pane, select Change settings, and then under Important Updates, select Install Updates automatically (recommended).
- Under Recommended Updates, select the Give me recommended updates the same way I receive important updates check box, and then select OK.
- On Windows 8.1
- Right-click the Windows icon in the lower right corner of your screen and then click Control Panel
- Click System and Security
- Click on Windows Update
- Click on 'Choose how updates get installed'
- Ensure the box next to 'Give me updates for other Microsoft products when I update Windows is checked', then click apply
- Click on Check for Updates.
- If updates are found, click Install Updates.
- On Windows 10
- Click Start and then click Settings
- Click Update & Security
- Click Windows Update
- Click on 'Advanced Options'
- Ensure that the box next to 'Give me updates for other Microsoft products when I update Windows' is checked, then click the back arrow
- Click the 'Check for Updates' button.
- On Windows 7
- How to update Skype for Business 2016 client (Office 365 version) on Windows
- This version should receive automatic updates from Office 365. If your client does NOT auto update, please see this article Skype for Business, Updating Skype for Business Office 365 Versions for steps on how to force the update for your client.
Or contact your IT department for help updating your Lync or Skype for Business client version.
What happens if I don't or can't upgrade?
In most cases, updates to this software should be getting installed automatically. One reason why we have instituted the minimum version blocking is that without that warning sign, ultimately some customers would never know that this automatic process is failing for their machine, leaving their personal work data and machines subject to unpatched security vulnerabilities and software bugs. If you aren't able to upgrade, it is likely that your machine has not been successfully updated for some time with likely more than just the Lync or Skype for Business software being significantly out of date.
The challenge for our instructions and documentation is that we cannot address how updates are handled in a customized way across all departments and colleges. If you are having problems updating your Lync or Skype for Business client, please contact your IT department for help updating your machine. If you aren't sure who that would be, please contact the Help Desk (244-7000) and they can locate them for you.
Windows clients and Mac 2011 clients that do not meet minimum version requirements will not be able to log in and will receive error messages similar to the following messages.
Windows client
Lync for Mac 2011 client
Why implement a minimum Lync/Skype for Business client policy?
- The newest versions of the Lync/Skype for Business client provide more features and functions.
- Older versions contain security vulnerabilities.
- If all clients are at a minimum version, all Lync/Skype for Business users have a better experience communicating with each other.
- Users with up-to-date client software require less technical support.