How to import metadata with a file placed in the Inbox/Outbox explorer

Content

A csv file for the Department dimension has been uploaded into the Inbox/Outbox explorer from EDMCS.

When I go into the Import Data menu, I select Inbox as the location versus Local. When I do this the Import File column changes from Browse to a text box. I assume this is where you would input the file name from the Inbox/Outbox explorer. However, when I put the file name in the box the Validate and Import buttons remain grayed out.

Has anyone experience this and is there an appropriate convention for the file name to be entered? I also tried inbox/"file name" and that did not work.