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Is there a web service that can list all Sharepoint Online top-level sites that exist in a tenant?
For example:
https://mytenant.sharepoint.com
Has
https://mytenant.sharepoint.com/sites/site1
and
https://mytenant.sharepoint.com/sites/site2
Is there a way to list site1 and site2 using a soap or rest web service?
If so, what permission is required?
If you are looking for a way to get a list of the site collections, and if PowerShell is OK:
Get-SPOSite
https://docs.microsoft.com/en-us/powershell/module/sharepoint-online/?view=sharepoint-ps
Otherwise, I'm not aware of a direct REST query for a list of Site Collections.
You can use the search REST API and search for contentclass:sts_site. This is security trimmed, so you will only see the site collections you have permissions for. You can test this from a SharePoint search center to see if it works.
