SharePoint CSOM, retrieving site collections. Limited to 300?

Question

I am trying to retrieve the site collections list from a SharePoint Online domain.

I am using C# and client object model.

The following code returns only 300 site collections.

var tenant = new Tenant(ctx);
spp = tenant.GetSiteProperties(0, true);
ctx.Load(spp);
ctx.ExecuteQuery();

Any idea on how to retrieve ALL site collections with CSOM ?

Thanks

Answer 1

I guess NextStartIndex didn't exist at the time this was asked, nowadays you can do:

SPOSitePropertiesEnumerable sites;
List<string> allSites = new List<string>();
int startIndex = 0;

do
{
    sites = tenant.GetSiteProperties(startIndex, false);
    ctx.Load(sites);
    ctx.ExecuteQuery();

    allSites.AddRange(sites.Select(s => s.Url));

    startIndex = sites.NextStartIndex;

} while (sites.NextStartIndex > 0);