#variable de login
$AdminName = "xxxxxxxxxxx.onmicrosoft.com"
$Pass = Get-Content "c:\Sharepoint\cred_.txt" | ConvertTo-SecureString
$Cred = new-object -typename System.Management.Automation.PSCredential -argumentlist $AdminName, $Pass
Connect-SPOService -Url https://nomdutennant.sharepoint.com -credential $Cred
si message : Connect-SPOService : Current site is not a tenant administration site.
ajouter -admin : Connect-SPOService -Url https://nomdutennant-admin.sharepoint.com -credential $Cred