Information
This checks all new passwords to ensure that they contain at least one base 10 digit (0 through 9).
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 Numeric Letters to greater than or equal to 1
Default Value:
Not enabled.