A powerful Mac software that provides its users with real-time collaboration

What's new in this version:

Let's assume that you want to troubleshoot issues that occur when users try to join a Skype for Business Online (formerly Lync Online) meeting by using Lync 2010, Lync 2013, the Lync for Windows Store app, or Lync for Mac 2011. Before you start, ask yourself and any external users who are experiencing the issue the following questions. Jan 23, 2013 I had a customer issue where Lync for Mac 2011 was failing to join meetings in our Lync Online Dedicated topology. They shared logs and I felt it was likely a keychain issue but then I was able to reproduce the problem at home on my MacBook Pro.

Microsoft Lync 14.4.3
- This security update resolves vulnerabilities in Microsoft Office. The most severe of the vulnerabilities could allow remote code execution if a user opens a specially crafted Microsoft Office file. An attacker who successfully exploited the vulnerabilities could run arbitrary code in the context of the current user. Customers whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.
The security update addresses the vulnerabilities by:
- Correcting how Office handles objects in memory
- Changing the way certain functions handle objects in memory
- Properly initializing the affected variable
- Helping to ensure that SharePoint Server properly sanitizes web requests
- Correcting how the Lync for Mac 2011 client validates certificates
Microsoft Lync 14.4.1
- Mac OSx 10.11 (El Capitan) is now supported
- Microsoft Office 2016 for Mac is now supported
- You may be prompted for credentials repeatedly even after you enter the correct credentials in Lync for Mac 2011
- PowerPoint 2016 for Mac presentations can't be uploaded in meetings in Lync for Mac 2011
- 'No results founds' when you search for a contact in Lync for Mac 2011 when you have Kerberos authentication enabled
Microsoft Lync for Mac 14.3.3
- Text formatting lost when you copy or paste them between Lync for Mac 2011 and Word on a Mac computer
- Lync for Mac 2011 conversations aren't saved in the Outlook Conversation History folder when you use an Office 365 account
- Video is distorted after a video call window is resized
- Lync 2011 for MAC doesn't automatically sign back in
- 'LocalEndpointAllocationFailed' error is logged and Lync for Mac client becomes unresponsive randomly
- Duplicate contacts are displayed in search results in Lync for Mac 2011
- Video preview window is black in Lync for MAC 2011
Microsoft Lync for Mac 14.2.1
- Mac OSx 10.11 (El Capitan) is now supported.
- Microsoft Office 2016 for Mac is now supported.
- You may be prompted for credentials repeatedly even after you enter the correct credentials in Lync for Mac 2011
- PowerPoint 2016 for Mac presentations can't be uploaded in meetings in Lync for Mac 2011
- 'No results founds' when you search for a contact in Lync for Mac 2011 when you have Kerberos authentication enabled
Microsoft Lync for Mac 14.1.1
- Call forwarding option for 'Only forward or simultaneously ring during work hours' is unavailable in Lync for Mac 2011
- Lync Lync for Mac 2011 disconnects every 30 seconds after you use a certificate that bases TLS-DSK authentication to sign in
- Hide Stage button does not work after a user shares the desktop in Lync for Mac 2011
- MAC address is not provided in the LIS request in Lync for Mac 2011 that supports Enhanced 911
- Multiple contact card options are greyed out in Lync for Mac 2011 when enhanced privacy mode is enabled
- Cannot update presence note in Lync for Mac 2011 that has lots of contacts
- System volume on Mac is reset every time when you start or join a meeting in Lync for Mac 2011
- Lync Energy usage for Lync for Mac 2011 is increased on a MacBook Pro that has two graphic processing units exist
- The icons of distribution groups are greyed out when you send an IM or start a call in Lync for Mac 2011
- Lync for Mac 2011 takes a long time to connect to Exchange server by using Autodiscover service
- Wireless network connections are incorrectly reported as wired in VQReportEvent element in Lync for Mac 2011
- Default installation preferences settings are not honored when you join a Lync online meeting in Lync for Mac 2011
- Lync for Mac 2011 users cannot join Lync meetings that is created in Lync Web Scheduler
Microsoft Lync for Mac 14.0.11
- Update enables users to view call history in Lync for Mac 2011
- Update for Lync for Mac 2011 enables users to store conversation history on an Exchange server
- Location is not displayed in Lync for Mac 2011 when users join a wireless network
- Error 'One or more selected contacts cannot receive your calls' when you forward calls in Lync for Mac 2011
- Delegation relationship is broken after a delegate signs in to Lync for Mac 2011
- Computer shutdown is not processed when Lync for Mac 2011 is running
- Update implements media resiliency mode in Lync for Mac 2011
- Dial pad disappears when a user who is not enabled for EV joins a video conference or a video call in Lync for Mac 2011
- Update enables users to interact with a contact from the call history in Lync for Mac 2011
Microsoft Lync for Mac 14.0.10
- Update enables users to view call history in Lync for Mac 2011
- Update for Lync for Mac 2011 enables users to store conversation history on an Exchange server
- Location is not displayed in Lync for Mac 2011 when users join a wireless network
- Error 'One or more selected contacts cannot receive your calls' when you forward calls in Lync for Mac 2011
- Delegation relationship is broken after a delegate signs in to Lync for Mac 2011
- Computer shutdown is not processed when Lync for Mac 2011 is running
- Update implements media resiliency mode in Lync for Mac 2011
- Dial pad disappears when a user who is not enabled for EV joins a video conference or a video call in Lync for Mac 2011
- Update enables users to interact with a contact from the call history in Lync for Mac 2011
Microsoft Lync for Mac 14.0.9
- Delegate doesn’t receive notification when you set delegation by using Lync for Mac 2011
- Update enables Lync for Mac 2011 to run in Mac OS X Mavericks
Microsoft Lync for Mac 14.0.8
- Delegate doesn’t receive notification when you set delegation by using Lync for Mac 2011
- Update enables Lync for Mac 2011 to run in Mac OS X Mavericks
Microsoft Lync for Mac 14.0.7
- Lync for Mac 2011 crashes in a conference call when an attendee drops out
- Additional Lync for Mac 2011 icon is created in the Dock when you upgrade Lync for Mac 2011
- Crash when you disconnect from a conference call by using Lync for Mac 2011
- An update is available for Lync for Mac 2011 to implement missing QoE data
- Initial instant message isn’t stored when a user doesn’t click 'Accept' to accept the message in Lync for Mac 2011
- Error message when you make a video call by using Lync for Mac 2011 in a MacBook Air laptop
- Can’t use the DTMF functions in the dial pad during a call in Lync for Mac 2011
- Can’t sign in to Lync for Mac 2011 by using an Office 365 account when the password has more than 16 characters
- Your display name is displayed as a SIP address when you sign in to Lync for Mac 2011
- Delay occurs when you sign in to a Lync for Mac 2011 client that is moved from a corporate network to an external network
- Instant message window closes when Lync for Mac 2011 disconnects from the network
Microsoft Lync for Mac 14.0.6
- 'The server is not reachable.' error message when you sign in to Lync for Mac 2011 in an internal network
- User interface freezes when you click the 'Phone' tab in Lync for Mac 2011 14.0.5
- Crashes when you sign in to Lync for Mac 2011 14.0.5 that has Kerberos authentication enabled

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Lync Web

Scoping the problem

Let's assume that you want to troubleshoot issues that occur when users try to join a Skype for Business Online (formerly Lync Online) meeting by using Lync 2010, Lync 2013, the Lync for Windows Store app, or Lync for Mac 2011. Before you start, ask yourself and any external users who are experiencing the issue the following questions:

• How many users does the problem affect?
• Are the users internal or external to your organization?
• Can the affected users reproduce the problem on a single computer or on multiple computers?

When you have the answers to these questions, see the following table to determine the kind of issue that you're dealing with. This table is provided to help scope the problem to a certain category. However, some categories may be outside the technical support boundaries of a Skype for Business Online support engineer.

Read the table as in the following example:

Multiple users... (but not a single user) ...from outside our organization...Can't join a Skype for Business Online meeting from multiple computers: (is usually caused by) Lync federation issue or external network issue.

Be aware that each column and each row are mutually exclusive. That is, the issue affects either a single user or multiple users, and the issue can be reproduced either on one computer or on multiple computers.

Problem

Note

If you don't experience one of the symptoms that are listed in the following table, use the scoping table in the 'Scope' section to narrow the problem to a specific kind of issue. Then, you can troubleshoot the issue by following the steps that are outlined here.

Troubleshooting Windows client issues

To resolve any client or computer issue, first make sure that the computer is up to date. The computer should have the latest operating system updates, audio and video drivers, and software application updates to make connecting to a Skype for Business Online meeting a successful experience. To do this, follow these steps:

1. Run Windows Update, and then verify that all optional hardware updates are installed. Specifically, make sure that video, audio, and network drivers are up to date.

2. Verify that Lync is up to date. See Lync Downloads and Updates for the latest Lync updates.

   Select your version (2013 or 2010), and then select Lync client under Category.

Now that the computer is up to date and meets all minimum system requirements, clear any cached credentials or certificates from previous logons:

1. Verify that the user has the correct certificates in Certificate Manager. To do this, follow these steps:

   1. Open Windows Certificate Manager. To do this, click Start, click Run, type certmgr.msc, and then click OK.
   2. Expand Personal, and then expand Certificates.
   3. Sort by the IssuedBy column, and then look for a certificate that is issued by Communications Server.
   4. Verify that the certificate is present and that it isn't expired.
   5. Delete the certificate, and then try to sign in to Skype for Business Online. If you can't sign in to Skype for Business Online, go to step 2.

2. Remove the user's Skype for Business Online credentials from the Windows Credential Manager. To do this, follow these steps:

   1. Click Start, click Control Panel, and then click Credential Manager.
   2. Locate the set of credentials that are used to connect to Skype for Business Online.
   3. Expand the set of credentials, and then click Remove from Vault.
   4. Try to sign in to Skype for Business Online, and then type the new set of credentials.

Skype for Business Online falls back to 'anonymous join' if it can't authenticate. As long as anonymous participants aren't explicitly blocked from joining the meeting, they should always be able to join the meeting.

Troubleshooting network issues

1. Verify that the computer is connected to the network. Determine whether the computer can access other websites.
2. Verify that the network meets the requirements for connecting to Skype for Business Online. For more information, see You can't connect to Skype for Business Online, or certain features don't work, because an on-premises firewall blocks the connection .

Fixing OCSMEET file associations in Windows

1. Verify that Skype for Business Online is the default program that is used to open .ocsmeet files. To do this, follow these steps:

   1. Click Start, click Control Panel, and then click Default Programs.
   2. Click Associate a file type or protocol with a program.
   3. Scroll down to .ocsmeet, and then verify that **Microsoft Lync **is selected as the Current Default option.

2. If step 1 doesn't resolve the issue, perform an Repair an Office application, or reinstall Lync 2010.

Troubleshooting Identity issues

This specific issue occurs when two users of the same Office 365 organization share the same user name (alias). Because of how Lync generates meeting URLs, two users on the same Office 365 organization who have the same user name will share the same meeting URLs. This causes the Skype for Business Online conference to become corrupted.

To resolve this issue, change the user name of one of the users who has the duplicate user name.

Troubleshooting Lync federation issues

If external users (and only external users) can't join a Skype for Business Online meeting, first determine whether they're trying to join as authenticated users or as anonymous users.

• If the user is trying to join as an authenticated user from another Lync or OCS organization:
  • Your Skype for Business Online organization must have External Communications enabled, and external communication must be completely open. Or, the external user’s domain must be in the Allow list.
  • The external organization must have federation configured correctly from their side, too.
  • For more information about federating with a Skype for Business Online organization, go to the following Microsoft TechNet website: Configuring Federation support for a Skype for Business Online customer
  • If authenticated join doesn't work, Lync should automatically try to join as an anonymous or guest user.
• If the user is trying to join as an anonymous user from Lync Attendee, or if the Lync Web App or is dialing in to a Skype for Business Online conference with an ACP access number:
  • For anonymous join to work, a specific DNS SRV record must be present in DNS.
  • For various methods of confirming your Skype for Business Online DNS records, see Troubleshooting Skype for Business Online DNS configuration issues in Office 365.

Joining meetings by using the Lync Web App

If these troubleshooting steps don't resolve the issue, and if joining the meeting immediately is a bigger concern, use the Lync Web App. Be aware that the Lync Web App doesn't include Voice over IP (VoIP) functionality. That means that participants can only view sharing sessions. To do this, follow these steps:

1. Copy the Join URL from the meeting invite, and then paste it into Internet Explorer. (Warning: Don't press Enter yet.)

2. Add '?sl=1' to the end of the URL, and then press Enter.

   Note

   You must have Silverlight installed to use the advanced features of the Lync Web App.

Troubleshooting issues with third-party software

If you’re using third-party software, you may be asked to update, disable, or remove the software as a troubleshooting step. If the issue is resolved after you take one of these actions, you may be referred to the third-party manufacturer for more help or to perform additional troubleshooting.

Lync Web App

Still need help? Go to Microsoft Community.