Separate different business priorities, risk concerns and misunderstanding. Ask the champion how decisions are made and which stakeholders need to participate.
Summarise the problem, evidence, options and unresolved trade-offs accurately. A technical benefit may have an operational cost another team is right to question.
Offer the appropriate evaluator a focused discussion or relevant reference. Research professional paths where needed and validate them. Coordinate new engagement with the account team rather than surprising the champion.
The outcome may be additional testing, a revised scope or a decision to defer. Keep the opportunity and forecast aligned with what the buyer actually agreed.
Orbb can support people research and suitable introductions. Its contribution is helping the team have the right conversations, not claiming that connection strength can resolve every commercial disagreement.