Use the Microsoft Support troubleshooting guideĬollect more information and seek additional help Check for common causes of Skype for Business Online sign-in errors Install a third-party SSL certificate on your ADFS server What do you want to do?Ĭheck for common causes of Skype for Business Online sign-in errorsįollow resolution steps for a specific error (Enterprise only)Īdd a firewall entry for msoidsvc.exe to your proxy server If the user still cannot sign in, collect additional information, and then seek additional help. If necessary, you can then follow specific resolution steps based on the type of error.

To troubleshoot Skype for Business Online sign-in errors, start by eliminating the most common causes of sign-in difficulty. Remember that a successful upgrade aligns technical and user readiness, so be sure to leverage our upgrade guidance as you navigate your journey to Teams. If you want to upgrade your organization to Teams yourself, we strongly recommend that you begin planning your upgrade path today. If you haven't upgraded your Skype for Business Online users yet, they will be automatically scheduled for an assisted upgrade.

Skype for Business Online was retired on July 31, 2021.

Skype sign in as offline