10/16/2020 Lync For Mac Sierra
This article contains information about how to troubleshoot Lync for Mac issues in Skype for Business Online (formerly Lync Online). It also discusses how to sign in to Skype for Business Online by using Lync for Mac and how to collect log files and system information for Lync for Mac issues.
Introduction![]() ![]() Microsoft Lync For MacProcedureBefore you troubleshoot
First, make sure that users follow the correct steps when they sign in to Skype for Business Online. If users are signing in to Skype for Business Online correctly and the issue persists, use one or more of the other methods later in this article to troubleshoot the issue, as appropriate for your situation.
Note
Lync For Mac Sierra Pro
Jun 13, 2016 July 2016 update for Lync for Mac 2011 14.4.1 (KB3175174) is more than an update. It's a full installer, and the product does work with Sierra. At least: it launches, allows me to sign in, presents the list of contacts and groups. May 10, 2017 Microsoft Lync is the new rich client for Lync users on the Mac platform and offers integrated functionality for instant messaging, presence, conferencing and voice. Lync for Mac is designed to work with both Lync Server 2010 and Lync Online to help you: Control communication costs; Improve user productivity. Stop desktop sharing. In the desktop sharing window, click the pop-up menu, point to the desktop that you want to stop sharing, and then click Stop Sharing. Accept or decline a desktop sharing invitation. If you see the desktop sharing invitation in the conversation window, click Join to join the desktop sharing session, or click Ignore to decline the desktop sharing invitation. After upgrading my Macbook Pro to the new macOS Sierra (v10.12), the Microsoft Lync 2011 client (v14.4.1) had a problem when attempting to connect with credentials for one of my customers. Specifically, Lync would connect when I was at home, on public. The system requirements for Skype for Business on Mac are OS X 10.11 El Capitan or macOS Sierra 10.12 ans above. It will not work on OS X 10.7 Lion. The release of Office 2016 would have been the perfect opportunity to release a new Lync For Mac 2016 and fix some of the many problems that constantly render Lync for Mac not working properly.
To connect Lync for Mac 2011 to Skype for Business Online in Office 365, you must have Lync for Mac version 14.0.6 or a later version installed. If you use a version that's earlier than version 14.0.6, you may have problems when you sign in to Skype for Business Online because earlier versions have issues that prevent authentication to Skype for Business Online. You can find the latest update at Update for Lync for Mac 2011.
Make sure that users follow the correct steps when they sign in to Skype for Business Online
To sign in to Skype for Business Online by using Lync for Mac, users should follow these steps:
If you still can't sign in
The following table describes error messages that may occur when users sign in or use Lync for Mac with Skype for Business Online.
Troubleshoot Lync for Mac issues
Use one or more of the following methods, as appropriate for your situation.
Users may be unable to sign in unless they first use an incorrect sign-in address
If Lync for Mac stops working after an Internet connectivity issue, flush the DNS cache
To flush the DNS cache, do one of the following, depending on the version of Mac OS that you're running:
Lync For Mac Sierra 2016
Download Microsoft Lync For MacClear cached data and corrupted certificates in Lync
First, delete the following folders:
Then, delete any corrupted or cached certificates. To do this, follow these steps:
Important
Before you perform the next step, try reproduce the issue by using a new test user account. If the issue doesn't repeat in the new account, then follow these steps:
Federated users synchronized from on-premises Active Directory Domain Services can't sign in by using a password that's longer than 16 characters
Organizations that have on-premises customer password policies may allow for passwords to exceed 16 characters. By default, the password policy in Office 365 restricts passwords to 16 characters or less. Because of the Windows Challenge/Response (NTLM) authentication mechanism in the Mac OS, passwords that are longer than 16 characters aren't recognized correctly, and this causes sign-in to fail.
To work around this issue, the user should change his or her password to be 16 characters or less.
Lync for Mac crashes and the user receives an EXC_BAD_ACCESS error
This error message usually occurs when Lync for Mac tries to integrate or schedule meetings with an Exchange mailbox that isn't hosted in Exchange Online. This scenario isn't supported in Skype for Business Online. For the best experience, you should use both Skype for Business Online and Exchange Online. However, if that isn't an option, follow these steps as a potential workaround:
Collect log files and system information for Lync for Mac issues
To collect log files and system information for Lync for Mac issues, follow these steps:
Uninstall and reinstall Lync for Mac 2011
If the steps in this article don't resolve the issue, try to do a clean uninstallation of Lync for Mac 2011, and then reinstall the application. For more information about how to do a clean uninstallation of Lync for Mac 2011, see How to do a clean uninstallation of Lync for Mac 2011.
More Information
If you're using third-party virtualization software for the Mac, it can coincide with various performance-related issues including but not limited to slow desktop sharing, unexpected poor media quality, possible sign-in and Exchange integration issues. In order to continue, Microsoft technical support may have to confirm that the issue occurs on a computer where the third-party virtualization software isn’t present.
Third-party information disclaimer
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.
Still need help? Go to Microsoft Community.
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