Send Emails to Users in a SharePoint Online Person Field with Multiple Selections

Hi ​@bamaeric 

You could use the REST API to do this.  the call would look something like:

_api/web/lists/GetByTitle(‘{MyListName}')/items({ID})?$select={MyUserColumn}/EMail&$expand={MyUserColumn}

Then parse the return for the email addresses (if you specify a JSON return the JSONPath expression would be something like $..EMail

That will work as long as you’re ertain all the assigned users in the column would have email addresses, otherwise it returns an error.  If you’re concerned about that then leveraging the graph API would be a better approach.  That would be something like 

https://graph.microsoft.com/v1.0/sites/{SiteID}/lists/{ListID}/items?$filter={filter}&$expand=fields($select=Title,MyUserColumn)

Hi Eric ​@bamaeric 
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Hi ​@brent_read 

Your response helped me figure it out. I was able to create a component workflow in Nintex Workflow to output a delimited string of emails that I can use in the Email action. Also by setting up a component workflow, I can call it from any other workflows that need this functionality.

I am working on a blog post (and possibly a video) about this in the near future.