Server with PowerShell_ISE doesn't serialize when connecting to EMS

Applies To
Exchange Server 2019 Exchange Server 2016

Symptoms

If PowerShell data-signing serialization is enabled, it causes scripts to fail while passing object types through pipeline commands if they’re run out of PowerShell_ISE on computers that have Exchange Managements Tools (EMS) installed.

Resolution

To fix this issue, install the following security update: