In SEQTA, go to Portal Management in Admin workspace.
Click Add Page and choose Classic
3. Enter the Name as Box of Books and your school's custom sign in page URL.
4. You can choose to constrain who has access to the Box of Books portal (eg parents) or can you provide access to all.
5. Click Save.
6. Reload SEQTA and Box of Books will appear as a Portal page.
Happy days.