Exchange online throttling

Question

I have a script that adds a mailbox permission to all users, but it is getting throttled after switching to the new app registration authentication. Is there any way to prevent this?

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try
{
    # Get the object ID in Office 365
    $objectId = [Guid]$Context.TargetObject.Get("adm-O365ObjectId")
}
catch
{
    return # The user doesn't have an Office 365 account
}

try
{
$session = $Context.CloudServices.CreateExchangeOnlinePSSession()
Import-PSSession $session -AllowClobber -DisableNameChecking -CommandName "Add-MailboxPermission"

 # Change mailbox type
    Add-MailboxPermission $objectId.ToString() -User "company administrator" -AccessRights 'FullAccess'
}
finally
{
    # Close the remote session and release resources
    if ($session) { Remove-PSSession $session }
}

Answer 1

Hello,

This behaviour is expected as the script establishes a new connection for each user. The issue is not related to Adaxes and is devoted to the limits of Exchange Online. To achieve the desired, you need to use a single connection to delegate all the permissions.

Unfortunately, we are currently very limited in resources and have no possibility to write and test the updated script for you. Should you, have issues doing it yourself, we encourage you to address the request to our consulting partners that provide professional services: https://www.adaxes.com/purchase_consultants.htm. Sorry for the inconvenience and thank you for your understanding.