convert username and password to uppercase

with APM you don't need an iRule for this, you can use the variable assign to manipulate strings.

for the username this would be the content: session.logon.last.username = return [string toupper [mcget {session.logon.last.username}] ] ;

Thanks for your reply. Should I be able to uppercase or manipulate the password? The username works but not the password.

you should use the secure variable there, and you might have to do mcget -secure {}, but i would start with trying secure variable from the drop down on the left side.