Create new throttling policy to mitigate spam in your environment

Create new throttling policy to mitigate spam in your environment

Create new throttling policy to mitigate spam in your environment

New-ThrottlingPolicy -Name Mitigatespam -RecipientRateLimit 10000 -MessageRateLimit 30 (similar to Office 365 settings)

Apply Policy to a particular OU

Get-Mailbox -OrganizationalUnit ‘domain/OUtest’ –resultsize unlimited | Set-Mailbox -ThrottlingPolicy MitigateSpam