Check your company’s Confluence, SharePoint, or IT Wiki. Search for "R2R Root CA - PEM and CRT files."

The Complete Guide to the Team R2R Root Certificate: Download, Trust, and Deployment

keytool -import -trustcacerts -alias r2r_root -file r2r-root.crt -keystore $JAVA_HOME/lib/security/cacerts

Most R2R teams host a captive portal. Navigate to http://r2r-ca.internal or https://proxy.r2r.company.com (using HTTP, not HTTPS, to avoid the chicken-and-egg certificate error).

export NODE_EXTRA_CA_CERTS=/path/to/r2r-root.crt Error: "ERR_CERT_AUTHORITY_INVALID" Fix: You installed the wrong store. Move the cert to "Trusted Root Certification Authorities," not "Intermediate."

"Certificate has expired" Fix: R2R roots usually have a 5-10 year lifespan, but sometimes teams rotate them. Download the new version.