There is a project (Project A) which is possibly being put on hold because resources are being diverted to another project that has potential for impressive revenue gains. The project sponsors, as well as the PM, both want to revisit Project A and bring it to a successful close, but they want to do this after the new opportunity is seized.
Putting Project A on hold may affect certain stakeholders who have an interest in this project. Some of the stakeholders are clients who aren't paying for the project but who know they directly benefit from the completion of Project A and who became clients because they knew Project A was in progress.
What are the steps that a PM should take when putting a project on hold for more than three months to an indefinite amount of time?