I'm unable to remove site collections that were provisioned alongside an Office 365 group.
I tried two approaches.
I deleted the O365 group in the O365 Admin Center. The group is gone but the opening the site collection produces a 403 forbidden error
Used Remove-PnPUnifiedGroup to remove the O365 group. This was also successful. However, I'm unable to delete the SC getting the same error message. I can't even connect to the site collection in question with Connect-PnPOnline (403 forbidden)
Using Remove-SPOSite gives a slightly different error message (Access to this Web site has been blocked).
Any ideas how I can remove those leftover site
Thanks in advance for your reply.