What are the requirements for the SCSP user and database user passwords
SCSP 7.2 and above
For SA and the database user, the password must be 8 to 19 characters long, not begin with _ and contain at least two two-letter characters
The password must contain only letters, numbers, #, @, and _
The password cannot contain =
If you install a SQL database, you must type the same sa password that is used on the SQL Server.
For more info please review the Management server installation settings and options techdoc