You're using an Apple iPhone or Apple iPad that's running Apple iOS 10.0.
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.
In this scenario, the link tries to start the desktop version of the website instead of the mobile version. The mobile version would try to start the Lync or Skype for Business app and join the meeting, or redirect you to the app store if it cannot join the meeting. The desktop version will not try to start the app.
To work around this issue if you have Lync 2013 for iPhone, Lync 2013 for iPad, or Skype for Business for iOS installed, follow these steps:
Tap the title of the meeting that you want to join.
Tap Join Meeting.
Note This workaround applies only to organizers and attendees who have Lync 2013 for iPhone, Lync 2013 for iPad, or Skype for Business for iOS installed. If you don’t have any of these apps installed, if you're on a Lync Server 2010 environment, or if you're a federated or anonymous attendee who is external to the organization, follow these steps to join the meeting:
Copy the meeting URL from the meeting invitation.
Go to the following webpage, and then paste the URL that you copied in step 1 into the text box on that webpage:
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.