disable self purchasing office365
#Install Module from PSGallery
Install-Module -Name MSCommerce
#Connect
Connect-MSCommerce
#Get Policy ID
$PolicyID = (Get-MSCommercePolicies).PolicyID
#Get all Product Policies
$Products = Get-MSCommerceProductPolicies -PolicyId $PolicyID
#Disable Self Service Purchase for each Product
foreach ($P in $Products){
Update-MSCommerceProductPolicy -PolicyId $PolicyID -ProductId $P.ProductID -Enabled $False
}
#Sanity Check
Get-MSCommerceProductPolicies -PolicyId $PolicyID