By default, when you delete a SharePoint Online site collection from the SharePoint admin center, it is moved to the Recycle Bin, where it is retained for a 30-day period. Some administrators might not have the patience to wait 30 days, especially if they need the URL that is taken by a site collection sitting in the Recycle Bin. Whatever the reason, if you need to permanently delete a SharePoint Online site collection, you can do so with the SharePoint Online Management Shell. After connecting to your tenant’s SharePoint admin center using the Connect-SPOServicecommand, the following will remove a deleted site collection from the Recycle Bin:

Remove-SPODeletedSite -Identity "<<Site Collection URL>>"

If you are new to PowerShell, you might find the Windows PowerShell for SharePoint Command Builder helpful. The following figure shows how to build the command for permanently deleting a SharePoint Online site collection using that tool.

Permanently Deleting an SPO Site Collection

NOTE: Windows PowerShell 3.0 is a pre-requisite for the SharePoint Online Management Shell. You can install PowerShell 3.0 from Windows Management Framework 3.0.

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