Global Admin Showing up with Access to All Users OneDrive for Business

Eric Adler 

You can use this script I wrote to get a list of every OneDrive account and then remove the offending user:

Edit - not sure why it is throwing HTML tags into the code, remove those - you get the point.

SaschaBuehler 

###Script written by thestephenh@yahoo.com

###Change Tenant name below
Connect-SPOService -url "<a href="https://TENANT-admin.sharepoint.com/" target="_blank">https://TENANT-admin.sharepoint.com/</a>"
###Export a CSV with every URL of every onedrive site -  Get-SPOSite -IncludePersonalSite $true -Limit all -Filter "Url -like '-my.sharepoint.com/personal/'" | select Url | export-csv -Path c:\test\sites.csv

#type the person you want to remove on the following line
$SecondaryAdmin ="REMOVETHISUSER@CONTOSO.COM"
$users = Import-Csv -Path "C:\test\sites.csv"
foreach ($user in $users){
                $site= $user.'Url'
                Set-SPOUser -Site $site -LoginName $SecondaryAdmin -IsSiteCollectionAdmin $false  
                write-host "OneDrive Access for $SecondaryAdmin removed for $site"
}