ORCID auto-update enables authors to have their ORCID records automatically updated. It works like this:
The publisher collects the author‚s ORCID iD during the publishing process (usually during manuscript submission)
The publisher includes the iD in the metadata when registering a DOI for the publication
The author receives an email from the DOI registry (currently Crossref) asking permission to update their record OR the author creates a DataCite profile and links it to their ORCID record
The author grants Crossref or DataCite permission to update their ORCID record (they only have to do this once)
Every time Crossref or DataCite register a DOI that includes the author‚s ORCID iD they automatically update their record
For more information, see https://www.crossref.org/community/orcid/