Bug in Application Gateway - Cert password
I could not provision a listener on Application Gateway using a SSL Certificate where the password for the .pfx file was this string:
gzsh4~?w_"!a\3"'z9TU
I tried this via 3 different mechanisms:
Portal
Powershell scripting
Resource Manager
All failed to provision the Ssl Certificate.
After regenerating the .pfx with a different password, everything was ok.
Guessing that the problem is one or more of these characters not being escaped correctly:
'
"
\
Regards,
Ben.

We will work on this as part of a bug fix. Not a feature request.