Changing the FROM address on a SharePoint 2013 email workflow

Issue: Can’t change the FROM address in SharePoint Online with a “send an email” action created through workflow.

Workaround: Call the HTTP Web Service Action

1. 1. Create a site workflow or a list workflow.
   2. Set the Go to Stage to End of Workflow.
   3. Create a new variable called: variableUsers. Type: String.
   4. Set a workflow variable action to Workflow Context: Initiator. (This is who will be emailed)
   5. Add a Replace Substring in a String action.
   6. Replace ; with “,” (The quotation marks should be included) in a variable called variableUsers.(email address, semi-colon delimited)  With the Output to itself the, Variable: variableUsers.
   7. Create a 2nd replace action, this time replace a \ with \\ in Variable: variableUsers(email address, semi-colon delimited), with the output to itself again.
   8. Set a new workflow variable action to variableUsers with [” and “] on each side, it should look like:  [“[%Variable: variableUsers%]”] as a string in the String Builder.
   9. Now create an action called Build Dictionary. This dictionary will have 5 variables. Create a new dictionary variable – Output to Variable: requestBody.

      Name	Type	Value
      properties/__metadata/type	String	SP.Utilities.EmailProperties
      properties/Subject	String	Hello
      properties/From	String	validSPUser@contoso.com
      properties/Body	String	This is the email body and the HTML of a normal send an email action can be copied into this value.
      properties/To/results	Dictionary	variableUsers

   10. Create a second Build Dictionary Action. Create a new dictionary variable – Output to requestHeaders.
       

       Name	Type	Value
       Accept	String	application/json; odata=verbose
       Content-Type	String	application/json; odata=verbose

   11.  Add a Call HTTP Web Service Action.
   12. Under “this” HTTP web service select the “…”. Click Add or Change Lookup – Workflow Context: Current Site URL, after the lookup type
       /_vti_bin/client.svc/sp.utilities.utility.SendEmail. So, it should look like:

       [%Workflow Context:Current Site URL%]/_vti_bin/client.svc/sp.utilities.utility.SendEmail

   13. Change the HTTP method to HTTP POST.
   14. Under the request select the requestBody variable.
   15. On the far right of the Call HTTP Web service action select the arrow and click Properties. Under the RequestHeaders dropdown select the variable requestHeaders.
   16. Publish and run the workflow.