msdeploy Password unknown characters
Try quoting the complete /P flag
MyApp-Test.deploy /Y /M:My-Connection-String.amazonaws.com /U:Administrator \"/P:rw)(&wq=WQe\"
You don't need to escape the characters. Just single-quote the entire password:
MyApp-Test.deploy /Y /M:My-Connection-String.amazonaws.com /U:Administrator /P:'rw)(&wq=WQe'