This is the built-in help made by Microsoft for the command 'Send-RDUserMessage', in PowerShell version 5 - as retrieved from
Windows version 'Microsoft Windows Server 2012 R2 Standard' PowerShell help files on 2016-06-23.
For PowerShell version 3 and up, where you have Update-Help, this command was run just before creating the web pages from the help files.
Sends a system message to a specified user session.
Send-RDUserMessage [-HostServer] <String> [-UnifiedSessionID] <Int32> [-MessageTitle] <String> [-MessageBody] <String> [<CommonParameters>]
The Send-RDUserMessage cmdlet sends a system message to a specified user session. Because the user session ID is unique only within the context of a session host, a
different session host server can share the same user session ID. The host server and session ID that you specify by using this cmdlet uniquely identify a session within a
deployment.
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Online Version: http://go.microsoft.com/fwlink/?LinkId=294252
Disconnect-RDUser
Get-RDUserSession
Invoke-RDUserLogoff
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Example 1: Send a system message to users of a Remote Desktop application
PS C:\> Send-RDUserMessage -HostServer "rdsh.contoso.com" -UnifiedSessionID 1 -MessageTitle "Message from Administrator" -MessageBody "Please save your work. You will be
logged off in 10 minutes"
This command sends a system message to users of the session with an ID of 1 on the host server named rdsh.contoso.com.