Running CA Gen 8.6 CSE Configuration (cse_config.exe) for SQL Server reports "Configuration Completed" but file "C:\ProgramData\CA\Gen 8.6\logs\CSE\loadschema.log" shows messages:
===
Load Schema HOST_NAME DSN_NAME USER_ID PASSWORD
load schema90 SASC 
SQLState = 28000, NativeError = 18456
Error = [Microsoft][ODBC Driver 13 for SQL Server][SQL Server]Login failed for user 'USER_ID'.
...
===

File "C:\ProgramData\CA\Gen 8.6\logs\CSE\err_file.lst" also shows:
===
SQLState = 28000, NativeError = 18456
Error = [Microsoft][ODBC Driver 13 for SQL Server][SQL Server]Login failed for user 'USER_ID'.
===

The DB user's PASSWORD contains a caret character "^" and is not visible in the loadschema.log PASSWORD field.
The load schema tables are loaded using command file "C:\Program Files (x86)\CA\Gen86\CSE\cse_msqls\loadschema.cmd", which itself calls the SQL Server bcp.exe program.
Under Windows command line, a "^" is used as an escape character for the character immediately following it when that following character is special and needs to be interpreted literally. So the "^" in the password is itself is not interpreted literally and is effectively ignored in the bcp.exe password field.
NOTE: The "^" character does not cause any problems in the earlier CSE Configuration steps for DB connection and initialisation because they do not use .cmd files.

Release : 8.6
Component : CA Gen Client Server Encyclopedia

After changing the password to not include the caret character "^", on re-run of the cse_config.exe program the load schema step runs successfully.