I've seen this question asked in different forms, but not necessarily with this configuration and I can't seem to figure this out.
I have 2 lists (List A and List B)- each have a multi-value lookup column that point to the same List C.
I cannot figure out how to use a workflow to lookup data in List A from the lookup column (List C) and then update List B's lookup column (also list C) with the same values.
As far as I can tell so far it involves building a string out of a set variable action that looks up the values from the lookup column in List A, but I cannot seem to get this working. Any suggestions?