Microsoft Lync Web App Plugin Mac

If you’ve been invited to an online meeting but don’t have Microsoft Lync 2010 communications software installed on your computer, you can join using Microsoft Lync Web App.

In this article

What is Lync Web App?

Lync Web App is the browser-based version of Lync 2010 that allows people who don’t have a Lync account and haven’t installed the Lync client to participate in Lync meetings, using either a Windows or Macintosh operating system. It’s a “light” program that takes up very little space on your hard drive and is relatively quick to start using.

Who is it for?

Jan 22, 2016  I found that if a MAC user joins the Skype meeting with Skype for business Web APP using any browser and share the screen they are not able to give control to anyone. Neither MAC users are able to control any shared content. Is this a limitation for Skype web App in MAC? Oct 28, 2012  Microsoft Lync Basic 2013 gives you instant messaging (IM), audio and video calls, online meetings, availability (presence) information, and sharing capabilities all from one, easy-to-use program. It’s a slimmer version of the full Lync. May 01, 2015  Microsoft is also working on a similar update for Lync Online that is scheduled for early 2015. The upcoming update will enable Lync Online users to join meetings by using Lync Web App in a 64-bit version of Chrome in Mac. This update will improve better user experience and will provide the same Lync Web App experience as in Lync Server 2013. To use Lync Web App, you’ll need a supported operating system and browser. For details about the various operating systems and browsers that are supported, along with any limitations, see the TechNet article Lync Web App Supported Platforms. Feb 13, 2020  Deploy Web downloadable clients in Skype for Business Server. 2/13/2020; 5 minutes to read +7; In this article. Summary: Deploy the Skype for Business 2015 Web App and Skype Meetings App used with Skype for Business Server. Skype for Business Web App is an Internet Information Services (IIS) web client that is installed on the server running Skype for. Oct 11, 2018 I was using Skype for Business web app under Chrome browser on my mac but since a couple of months on Mohave OSX and on previous one I started to face an issue with black screen isntead of shared content. I installed Skype for Business plugin on Safari and used it successfully before upgrading to Mohave. Feb 16, 2018 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.

Lync Web App is designed mainly for external partners, such as salespeople, who are invited to Lync meetings, but it is also useful for employees who are not at their usual computer at meeting time, or have not yet upgraded to Lync 2010.

To check whether you or a colleague will be able to use Lync Web App, see Supported platforms for Lync Web App.

What can it do?

During a meeting, Lync Web App provides many Lync features; these include meeting-wide instant messaging (IM), phone-based audio, file distribution, presenting with Microsoft PowerPoint presentation graphics program, and desktop and program sharing.

Notes:

  • Sharing and presenting features are dependent on permission levels set by the meeting organizer, so they may not be available. Only users with presenter privileges can share files and programs.

  • The first time that you initiate a sharing session, you will be prompted to download the required sharing plug-in.

Lync Web App cannot be used to schedule meetings or to exchange instant messages with individual meeting attendees.

Where do I start?

In addition to needing one of the supported operating system and Internet browser combinations, an Internet connection, a phone (unless you’re also running Microsoft Office Communicator 2007 R2), and an invitation to a Lync meeting, you will also need the Microsoft Silverlight 4.0 browser plug-in, or a later version of Silverlight, installed on your computer before your first online meeting.

For a list of supported operating system and browser combinations, see Supported platforms for Lync Web App.

To download Silverlight, visit the following Web site: Download Microsoft Silverlight.

With these requirements in place, you’ll be ready to get started. To learn how, see Quick Start: Participate in online meetings with Lync Web App.

The Lync Web App plug-in is required for audio, video, and screen sharing during a Lync Meeting. If you’re having trouble with plug-in, try these suggestions first:

  1. Make sure your computer operating system and web browser are on the list of supported platforms.

  2. Go to Control Panel > Programs and features and, if required, uninstall existing versions of the plug in.

  3. Open an InPrivate browsing session in Internet Explorer and try joining the meeting again. If that succeeds, consider clearing your browser cache to remove obsolete credentials that might be interfering with sign-in.

If you still can’t install the plug-in, review this list of issues and errors.

Plug-in download fails

Lync Web Plugin Download

Make sure your browser is set up to allow downloads, and the downloading of encrypted files.

To allow downloads in Internet Explorer:

  1. Click Tools > Internet Options.

  2. Click the Security tab > Custom Level.

  3. Scroll down to Downloads and click Enable for File download.

  4. Re-join the meeting. The plug-in should download without errors.

To allow the downloading of encrypted files in Internet Explorer:

  1. Go to Tools > Internet Options > Advanced.

  2. Scroll down to the Security section.

  3. Clear Do not save encrypted pages to disk and click OK.

  4. Re-join the meeting. The plug-in should download without errors.

Plug-in file moved or deleted

If you receive the error message LwaPluginInstaller32.msi has been moved or deleted, follow these steps to resolve the issue:

  1. Exit the meeting and re-join it.
    A dialog box displays with options to save the plug-in file or run it.

  2. Click Save.

  3. Specify a location on your computer to save the file, and then click Save.

  4. Locate the saved plug-in file on your computer and double-click to run it.

Plug-in isn’t detected after installation

If you get the notification to install the plug-in even after installing it, restart your browser. If you’re running Windows 8 on your PC, make sure that you’re running the version of the browser for the desktop.

This issue can also occur if you’ve launched your browser with the Run As Administrator option. Lync Web App is not supported in this environment. To use Lync Web App, launch your browser as a standard user.

Plug-in installed but unable to use audio, video and sharing

You may need to change your browser settings to allow ActiveX controls.

Important: If you're unable to change ActiveX settings, you might not have permission to and you should check with your workplace technical support.

To turn off ActiveX filtering for a single session in Internet Explorer:

  • Tap or click the Filter button in the address bar, and then tap or click Turn off ActiveX Filtering. If the Filter button doesn't appear in the address bar, no ActiveX content is being filtered on the site.

To adjust ActiveX control settings in Internet Explorer:

  1. Tap or click the Tools button, and then tap or click Internet options.

  2. On the Security tab, tap or click Custom level, and then under ActiveX controls and plug-ins, review these settings:

    • Allow Automatic prompting for ActiveX controls by tapping or clicking Enable.

    • Allow Internet Explorer to Display video and animation on a webpage that doesn't use external media player by tapping or clicking Enable.

    • Allow Internet Explorer to Download signed ActiveX controls by tapping or clicking Enable, or Prompt if you want to be notified each time this happens.

    • Allow Internet Explorer to Run ActiveX controls and plug-ins by tapping or clicking Enable, or Prompt if you want to be notified each time this happens.

    • Microsoft project viewer app. Allow Internet Explorer to Script ActiveX controls marked safe for scripting by tapping or clicking Enable, or Prompt if you want to be notified each time this happens.

  3. Tap or click OK, and then tap or click OK again.

Firewall warning when joining a meeting from Lync Web App

Microsoft Lync Web App Download

In the Windows Firewall security alert, it’s OK to select Cancel if you don’t have administrator privileges on your computer.

Download Lync Plugin

Change the plug-in’s default domain trust setting

When installing the plug-in, you’re given the option to trust the domain that loads the plug-in.

If you selected Always allow the plug-in for this domain but want to change that option, follow these steps:

On Windows Operating Systems

Lync Web App Plugin Install

Web

  1. Select Microsoft Lync Web App Plug-in from the list of installed programs in Control Panel, and click Uninstall.

  2. The next time you join a meeting with Lync Web App, select Allow to trust the plug-in domain for just that meeting.

On Macintosh Operating Systems

  1. Open ~LibraryPreferencesrtcpal_registry.reg in the text editor.

  2. Navigate to [HKEY_CURRENT_USERSOFTWAREMICROSOFTLWAX8615.1ALLOWEDDOMAINS]

  3. Delete the line for the domain you want to stop trusting. For example, to stop trusting the domain Contoso.com, delete the line 'Lync.Contoso.com'='

  4. The next time you join a meeting with Lync Web App, select Allow to trust the plug-in domain for just that meeting.

I’ve tried everything and still can’t install the plug-in

Your organization’s computer policies might be preventing the plug-in installation. To resolve this issue, contact your workplace technical support.

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