Is there another way to find Site Administrators in SharePoint Online?
I have tried the following but on some sites I get an error 429.
Get-SPOUser -Site $SiteUrl -Limit All | select DisplayName,LoginName,IsSiteAdmin,IsGroup,@{n="Groups";e={$_.Groups -join ";"}} | Export-Csv -nti "blabla.csv"
Most of the sites it fails on seem to use the "Everyone except external users" group and this would be in excess of 5000 users which I believe to be the problem.