Ask the user to select the Always trust this server check box, and then click Connect. Verify that the domain name in the dialog box is a trusted server in your organization-for example,. Possible Causeĭuring sign-in, a dialog box appears that contains the following phrase: cannot verify that the server is trusted for your sign-in address. The table below lists some common causes of sign-in errors and some steps you or the users can take to resolve them. Most sign-in issues can be traced to a small number of causes, and many of these are easy to correct. 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.

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