Hello davewalter,
Yes, it is possible to re-assign an Opportunity to other Customer/Lead by simply selecting a diiferent Customer/Lead from the Contact dropdown on the Edit Opportunity Screen. Coming to your next question about merging two customers/leads in Method is not possible. But you can merge two different customers in Quickbooks and sync it back to Method.
To merge two Customers in QuickBooks:
- Click the Customer Center.
- Click the Customers & Jobs tab.
- Double- click the customer or job you don't want to use.
- In the Edit window, change the custoemr or job name(at the top of the window) to the same as the entry you are combining it with.
- Click OK.
- Click yes confirm that you want to merge the two names under the same name.
Hope this helps!
-Inder