RE: Edit expenses during approval
There are just a few things the reviewer e.g. the accountant may edit:
- Project ID
- VAT groups
- VAT amount
- probably the accounting distribution (I am not sure if they have fixed this)
If I recall correctly, this works if the approver is given a task or a queue in the workflow, i.e. if they assume the responsibility for the expense report processing.
Other fields remain not editable and need the expense report to be returned to the submitter.
A few years ago I had a long discussion over several days with a stubborn and rude lady from the Microsoft Support to at least achieve the above. As for the remaining fields - this is the way it is, and remains this way.