Cannot update managed metadata column with Allow Multiple Values enabled

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Posted on by KyleO

Hello!

I have written a Logic App that gets documents from one SharePoint library and creates new documents in another using most of the same metadata. Everything worked great until the requirements changed and two of the managed metadata columns needed to allow multiple values. I cannot figure out how to get the values copied. I have tried using arrays and strings, appending to them, anything I can think of. Pretty much everything results in a "BadRequest" error with the other metadata populated but not the Training Areas or Business Segment columns. I have searched and found no help so I am reaching out to this community in hopes that an expert can explain how to accomplish what I need to do.

Here is how the columns are defined: