I usually would write a little script, maybe in python, to iterate through a csv file to do this type of thing, , you can have more control over things.   if you wish to do it from the command line then this command works for me.

curl -k --user admin:n0v3ll -H "Content-Type: application/json" -X POST -d '{"postOfficeId":"POST_OFFICE.dom1.po2-1","sources":[{"id":"USER.DOM1.PO1-1.userr20","createNickname":"true"}]}' 172.17.2.180:9710/.../moverequests

I would suggest you read the REST API documentation for more information, for instance you can pass down multiple users to move.

This is all very confusing, literals vs directives in these commands.

Lets say I had a user named jsmith who resides on a post office called GWPO6 in a domain called testdomain and I wanted to move that user to a post office in the same domain called GWLLPO, how would your example be altered.

This is all very confusing, literals vs directives in these commands.

Lets say I had a user named jsmith who resides on a post office called GWPO6 in a domain called testdomain and I wanted to move that user to a post office in the same domain called GWLLPO, how would your example be altered.