After six years, mainstream maintenance for SAP Solution Manager 7.1 has ended on December 31, 2017. Customers still using the 7.1 release have transitioned to customer-specific maintenance automatically (read the blog).
Product information for release 7.1 remains available on SAP Help Portal. The 7.1 website here on SAP Support Portal will be available until end of February 2018.
SAP recommends transitioning to the new release 7.2 as soon as possible!