Mar 17, 2020 You have Microsoft Lync 2013, Lync 2010, or Skype for Business installed on the device. You try to join a meeting from outside the Lync or Skype for Business app. For example, you tap the 'Join Meeting' link in an email message or calendar appointment in an app other than Lync or Skype for Business. Apr 07, 2020 Enable the Skype Meetings App by following the instructions in the 'Enable Skype Meetings App' section of Deploy Web downloadable clients in Skype for Business Server 2015. After these steps are done, web app users will automatically use the Skype Meetings App when they join a meeting.
Here's how to manually update Skype on your Mac or PC or download the latest version. Check out the products mentioned in this article: MacBook Pro (From $1,299.99 at Best Buy). For the best Mac client experiences and an always up-to-date infrastructure, we recommend all customers migrate to Office 365. Skype for Business Server 2015 customers should at a minimum download and install the Skype for Business Server 2015 Cumulative Update version 9319.272 or higher.
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-->- This article covers how users who do not have a Skype for Business account can attend a Skype for Business meeting using the Skype for Business Web App. Minimum hardware/software requirements: Windows 7 or Mac OS X 10.8 with Internet Explorer 11 or Firefox 12 or Safari 5 or Chrome 18. For more on requirements, view this article from Microsoft.
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- Apr 07, 2020 Enable the Skype Meetings App by following the instructions in the 'Enable Skype Meetings App' section of Deploy Web downloadable clients in Skype for Business Server 2015. After these steps are done, web app users will automatically use the Skype Meetings App when they join a meeting.
Symptoms
Consider the following scenario.
Cannot Download Skype For Mac
- You join an online meeting by using the Skype for Business Web App or Lync Web App on macOS High Sierra 10.13 (including beta versions).
- Someone in the online meeting shares their desktop.
Skype For Business Mac Cannot Join Meeting
In this scenario, you see only a black screen instead of the shared desktop.
This problem occurs when the meeting is hosted in Skype for Business Server 2015 or Lync Server 2013. This problem doesn't occur if the meeting is hosted in Skype for Business Online.
Workaround
Skype for Business Web App
To work around this issue for Skype for Business Web App, use the Skype Meetings App instead. To do this, the system administrator must follow these steps:
- Install the May 2017 update for Skype for Business Server 2015.
- Enable the Skype Meetings App by following the instructions in the 'Enable Skype Meetings App' section of Deploy Web downloadable clients in Skype for Business Server 2015.
After these steps are done, web app users will automatically use the Skype Meetings App when they join a meeting.
Lync Web App
There is no workaround yet for this problem for Lync Web App.
Status
Microsoft is working closely with Apple to resolve this problem.
More information
This issue can also occur when the camera isn't granted access permission to Skype for Business.
- Select Apple menu > System Preferences, select Security & Privacy, and then Privacy.
- Grant Skype for Business access to the camera. You will be prompted to restart Skype for Business.
- Check if the issue is resolved after the restart.
Still need help? Go to Microsoft Community.
Skype for Business uses these ports and protocols:
Skype For Business For Mac Download
5061 TCP (SIP) - Used for SIP/MTLS authentication of A/V users. Communications flow outbound through the internal firewall
443 TCP (HTTP) - Used by Skype for Business clients/Lync connecting from outside the intranet for SIP communications
1024-65535 UDP/TCP - Port range used for inbound and outbound media transfer through the external firewall
6891-6901 TCPPort range used by Skype for Business/Lync clients for file transfer
Make sure your firewall is not blocking these and it should work. I suspect that it is a firewall issue since it works internally on the same network.
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