Sage CRM 2021 R1 release notes provide information about new features, enhancements, issues addressed and known issues in the release. Key additions include support for OAuth 2.0 authentication, formatting telephone numbers as links, inline customization of lists and grids, self-service password recovery, support for Microsoft Azure VMs, and documentation of additional RESTful API endpoints. The release also includes various bug fixes and addresses prior known issues. System requirements and installation/upgrade instructions are included.