Adding B2B guests and adding to security group

Think I have somehow got it, this seems to run with a single user, will test with multiples soon. Probably not technically right but it works so far so thats the main thing!

$invitations = import-csv C:\B2BUploads\Test.csv

$messageInfo = New-Object Microsoft.Open.MSGraph.Model.InvitedUserMessageInfo

$messageInfo.customizedMessageBody = "Welcome message"

$GroupID = ((Get-AzureADGroup -Filter "Displayname eq 'Test'").ObjectID)

$newuser = foreach ($email in $invitations) {
    New-AzureADMSInvitation `
        -InvitedUserEmailAddress $email.InvitedUserEmailAddress `
        -InvitedUserDisplayName $email.Name `
        -InviteRedirectUrl https://google.com `
        -InvitedUserMessageInfo $messageInfo `
        -SendInvitationMessage $true
}

$newuser `

Start-Sleep -Seconds 2

foreach ($email in $invitations) {
    Add-AzureADGroupMember `
        -ObjectId $GroupID `
        -RefObjectID ((Get-AzureAdUser -All $true | Where-Object {$_.DisplayName -in $email.Name}).ObjectID)
}