Right-click the Start button and select Run.Make sure that Microsoft Online Services Sign-in Assistant is running on Windows Services by following these steps: Update the Lync client to the latest version that's available on the Downloads page of the Microsoft 365 portal. If you have trouble signing in to Skype for Business Online, click Delete my sign-in information and Lync 2013 will automatically remove any saved password, certificates, and connection settings for the user account. Solution Resolution for Lync 2013 Delete the sign in informationĭuring the sign in process, Lync 2013 caches your credentials and other information about its connection to Skype for Business Online. Part of the certificate chain is untrusted and the certificate chain fails validation.The Skype for Business Online personal certificate or the cached credentials are corrupted or are out of date.The certificates cannot be acquired or validated. The Microsoft Online Services Sign-In Assistant is out of date.This issue may occur if one or more of the following conditions are true: There was a problem verifying the certificate from the server. If the problem continues, please contact your support team.Īdditionally, when you try to sign in to Lync after a network outage or a Skype for Business Online service outage, you receive the following error message: Cannot sign into Lync. The interface makes it easy to start an instant messaging session, switch to another mode (like a video call), and bring in other participants as needed.When a Microsoft 365 user tries to sign in to Skype for Business Online (formerly Lync Online) by using Lync 2010 or Lync 2013, the user receives the following error message: There was a problem acquiring a personal certificate required to sign in.

We recommend that you leave Lync 2011 for Mac running all the time, the same way most people leave their email running all the time. If you would like Lync to save your password, check the “Save my password” box Lync will automatically populate this field the next time you launch it.Įnter the password you use for the email address entered in Step 2. The first time you sign in, enter your email address. Follow the verification tutorial before trying to sign in. Lync 2011 for Mac must be at version 14.0.11 or later in order to sign into the University’s Skype for Business service.

Skype sign in mac