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How can I get a list of all site collections in my SharePoint Online farm including ones for Office 365 Groups?
I've ran into problems when creating a new site collection where I'm unaware that an Office 365 group already exists with the same url. The cause is not always obvious because sometimes I get an error where it says that the site already exists and other times I get an access denied error even though I am a Global Admin.
PowerShell based solution:
Download SharePoint Online Management Shell
https://www.microsoft.com/en-us/download/details.aspx?id=35588
Run the commands below to get a list of all site collections
Connect-SPOService -Url "https://tenantname-admin.sharepoint.com"
Get-SPOSite
