Microsoft has rolled out a significant behavioral change to the Windows Remote Desktop Connection application (MSTSC) as part of its April 2026 Patch Tuesday security update, introducing new warning dialogs designed to protect users from phishing attacks that exploit Remote Desktop Protocol (.rdp) files. Microsoft has rolled out a significant behavioral change to the Windows Remote Desktop Connection application (MSTSC) as part of its April 2026 Patch Tuesday security update, introducing new warning dialogs designed to protect users from phishing att... [3355 chars]