Information
This checks all new passwords to ensure that they contain at least one English uppercase character (A through Z).
Rationale:
This is one of several settings that, when taken together, ensure that passwords are sufficiently complex as to thwart brute force and dictionary attacks.
Solution
Navigate to Device > Setup > Management > Minimum Password Complexity
Set Minimum Uppercase Letters to greater than or equal to 1
Default Value:
Not enabled.