The Global Ecosystem-based Adaptation (EbA) in Mountain Ecosystems Programme was jointly implemented from 2011 to 2016 as a flagship programme of UNEP, UNDP and IUCN, funded by the Government of Germany through the International Climate Initiative (IKI), in partnership with the Governments of Nepal, Peru and Uganda. The programme was implemented at global level and at national level with pilot project work in mountain ecosystems in countries that are particularly vulnerable to climate change. The objective of this publication is to present lessons learned throughout the process of ‘making the case for EbA’ to government and other stakeholders, encouraging them to include EbA approaches in broader adaptation strategies, and to bring about the required shifts in policy and finance.