Repair your Microsoft 365 installation files and contact your IT admin if the issue persists.ĭid you manage to solve the problem and access your Skype for Business account? Let us know in the comments below.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. Then, launch the Credential Manager and delete all the Skype credentials. If Skype says there was a problem verifying the certificate from the server, flush your DNS cache, and restart your computer and router. Let your admin know what troubleshooting steps you’ve tried so far. Maybe they need to reinstall the certificate on the server where Skype for Business is installed. If nothing works, contact your IT admin for further help.
Launch Skype and check if you can sign in to your account. Then, plug your router back into the wall outlet, and wait until your computer goes back online. If you still can’t log in to your Skype for Business account, disconnect all the other devices connected to your network, unplug your router, and leave it unplugged for two minutes. Launch Command Prompt with admin rights, and run the ipconfig /flushdns command to flush your DNS cache.
Make sure there are no connection issues on your end. Then, select all the Skype entries and hit the Remove button.
To clear your Skype credentials, go to Control Panel, select User Account, and click on Credential Manager.
Then, restart Skype, type in your username and password, and hit the Log in button. Remove all the Skype login information saved on your machine. Skype: There Was a Problem Verifying the Certificate from the Server
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