To pay your bill or set up a payment plan, you go to the Lesley University Student Account Center (SA) - https://lesley.afford.com. Lesley's Student Administrative Services department will send you an invitation to register for access to the Student Account Center. After you've registered at the SA Center, you can click on the Pay my bill link in LOIS to get to the SA Center in the future.
Your username for the site will be your Lesley email address. If you don't have a Lesley email address, then the initial invitation will be sent to your personal email on file. The password for the Student Account Center will be set up at the time you register on the site. IT cannot reset that password. If you have any issues logging into the SA Center (not LOIS), then just click on the Reset Password link. A window will open right below that link where you will enter your email, and a temporary password will be sent to you.