The script: import-module RemoteDesktop Get-RDUserSession -ConnectionBroker connectionbroker.domain.local | select username, hostserver, unifiedsessionid | Out-GridView -title "Select users to message" -passthru | Send-RDUserMessage -MessageTitle "Message from Tech Support" -MessageBody "Server will be rebooting shortly please save your work." The result: After selecting "ok" this appears on the RDSH server. Why does it work? Well send-rdusermessage really …
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