I'm trying to write a workflow to send a document from one site collection to another, using Upload a File action. It works well with text fields and mapping them but I can't seem to get a MM field or a person or group field to work at all. Additionally, it seems that a date/time field is pushed over but the time is off by 6 hours.
Here is what I'm trying to do.
Try storing those fields that aren't working into variables, and then pass the variables.
As for the time, yes, the official system time is GMT so, you're going to need to do a date/time calculation. (Don't forget about daylight savings time.)
for Metadata fields update you have to use Display name
for more info : Refer this link