You may encounter the following issues when you use Exchange Server 2016 and Exchange Online after the July 2017 security update KB4025333 for Windows Server is installed.
When you open the Exchange Management Shell, you receive the following message in the Exchange Management Shell:
WARNING: Can't generate Export-Module for the current session using Import-PSSession.
When you try to use Windows PowerShell to connect to a remote Exchange Server 2016 or Exchange Online, you receive the following error message in Windows PowerShell:
Import-PSSession: Method not found: 'System.String System.Management.Auomation.CommandMetadata.EscapeBlockComment(System.String)'