What this integration does
The LinkedIn Cross-Post connector listens for the post:afterPublish hook. It first resolves the connected member's author URN via LinkedIn's /v2/userinfo endpoint, then creates a UGC post through /v2/ugcPosts with ARTICLE share media pointing at the canonical post URL, the post title, and the excerpt as the share commentary — published with public visibility immediately. The connected access token needs the w_member_social scope. If the token is missing or the URN can't be resolved (an expired token or a scope that doesn't include posting), the crosspost is skipped and logged; it never blocks the post from publishing.