You can follow the steps in this article to get your setup completed. Looks like you need help setting up Skype with your Microsoft 365 or Office 365 subscription. If you have a firewall or proxy server that restricts access to parts of the web, consider hiring a Microsoft partner to set up Skype for Business for you.

You must have global admin permissions to set up Skype for Business. Skype for Business Online, excluding the service operated by 21Vianet in China, was retired on July 31, 2021. 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 operated by 21Vianet in China will be retired on October 1, 2023.

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