Hi,
You wont be able to invoiced contact. You can cancel the existing contact and create a new contact. While creating the new contact select the contract template which has allotment type as
coverage dates.
You wont be able to define the contract with allotment type as
coverage dates and allotment type as 1000 cases/minutes in the same contract.
Chandan - http://mscrm-chandan.blogspot.in/ I hope this helps. If my response answered your question, please mark the response as an answer and also vote as helpful !!!