For logging into DigiLocker with the credentials sent by CBSE via SMS, please note that the password is in lower-case characters.
Your mother's first name in (lower case) should exactly match with the name written on your admit card. E.g. If your mother's name on your admit card is A Sharma and roll number is 1234567, your password will be a4567. If your mother’s name on your admit card is Sushmita Mahajan and your roll number is 1234567, your password will be sushmita4567.