In this blog you will see how to resolve "Current site is not a tenant administration site" error when trying to connect to SharePoint Online site using PowerShell.
I was trying to connect to SharePoint Online using Powershell I was getting the following error
Resolution:
Make sure the URL is the URL of the SharePoint Online Administration Center
Connect-SPOService -Url https://c986-admin.sharepoint.com/ -credential [email protected]