USTA National admin will need to send the Administrator LEAD an invitation to claim the Tennis on Campus (TOC) site. Once the first Administrator has claimed the site, then they can add additional Administrators.
The National admin will send an email with a subject line: You've been invited to claim an organization
From that email, you can accept the invite by clicking on the Accept Invite link.
You will then be asked to log in using your USTA log in, if you have not got a USTA log in, then sign in to create one. If you are not sure if of your USTA number you can see here: Help to Find Your USTA Account
Once you have claimed the school - you can add a logo and branding colors.
You will need to agree to the terms and conditions and confirm you have the rights to admin in this school.
Note: You can go back and change/add the logo and color after you have confirmed and claimed the school. You do this by clicking on the Basic Info tab as below.