Name the people who own the account
Give each large customer a primary contact and a backup. A named person who knows the account is worth more than a faster generic queue.
Keep answers to security questions ready
Store current answers to the common questionnaire items in one place, with an owner who reviews them each quarter. Reusing approved wording saves days per deal.
Agree an escalation path in writing
Write down who the customer calls when something is urgent, how fast you respond and who the next person is. Share it at kickoff, not during an incident.
Set service levels you can keep
Offer response targets by priority and only promise what your team can cover. A missed enterprise commitment costs more than a modest target kept.
Report on a regular schedule
Send a short monthly summary of tickets, response times and open issues. Customers who see the numbers ask fewer questions about them.
Keep the general queue fair
Route enterprise tickets by priority tag, not by a separate team that starves everyone else. Review wait times for smaller customers each week.