Typically, most travel insurance plans in the past have excluded business related reasons for trip cancellation or trip interruption.  Some policies do cover an unexpected layoff or termination if you have been employed a minimum number of years, depending on the policy.  Recently, many travel insurance plans have added an optional “cancel for work reasons” benefit for an additional premium if you meet the conditions that apply.  This would afford you reimbursement for trip cancellation in the event your approved time was revoked and you were unable to to continue on your scheduled trip.