Client Access Rules
Client Access Rules are something new to Exchange Servers. These rules control access to Exchange Services by various client types. Client Access Rules are like Transport Rules for SMTP mail flow. We can create conditions and actions to affect access and authentication with Exchange 2019. Online documentation for this cmdlet can be found here:
Configuring Client Access Rules is only possible in Exchange PowerShell. There is no option or viewable configuration in the Exhange Admin Center for Exchange 2019. Let's see what PowerShell cmdlets are available for us:
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