Is it correct to use "uppercased"?
No, it is not a verb in any common dictionary, nor generally accepted.
Use the following instead:
You should use an upper-case password.
Apparently, it is acceptable to some people:
Merriam Webster: Uppercased
No, it is not a verb in any common dictionary, nor generally accepted.
Use the following instead:
You should use an upper-case password.
Apparently, it is acceptable to some people:
Merriam Webster: Uppercased