Joint Webinar organised by OpenAIRE and euroCRIS focusing on how CRIS Systems can be compliant with OpenAIRE Guidelines as well as on the workflow to register in OpenAIRE. This webinar provided a follow-up to the Oct 5th, 2022 session on the same topic. The April 19th specifically targeted national and regional CRIS systems, including brief presentations on the procedures followed and the lessons learnt by national-level initiatives who have already managed to become OpenAIRE-compliant such as VIRTA in Finland and FRIS from Belgium. Institutional CRIS managers may also be interested in joining since the workflows for CRIS registration and setting up the OAI-PMH endpoint that will allow the CRIS to be harvested by OpenAIRE are largely common. These were discussed with the OpenAIRE colleagues at the Bielefeld University Library, who are currently providing technical support to interested parties in this domain. In this final version of the webinar presentation, on page 1 - Tom Wuyts, Flemish Government, FRIS was corrected.