How to update multiselect people picker field in power automate using Update Item action

Question

I have a SharePoint list with Approvers as multiselect mandatory user field. There is a power automate flow which uses SharePoint Update Item action to update few fields.

As the approvers field is a mandatory field I am unable to proceed further to update the records.

Kindly guide me on how to update this multiselect approvers field as well.

Answer 1

Please following steps:

1. Add a Trigger "When an item is created or modified"

2. Add an Action "Initialize variable"

3. Add an Action "Append to an array variable"

4. Add an Action "Updated item"

Answer 2

In order to update a user field, you have to supply an object with the user claims

{
  "claims": "userclaims"
}

In order to do the same for a multiselect field, you have to supply the object in an array

[
  {
   "claims": "user1claims"
  },
  {
   "claims": "user2claims"
  }
]   

If you are only adding one person, you still have to put the claims object insdie the square brackets

[
  {
   "claims": "userclaims"
  }
]   

You would then use the output of your compose action in the Update Item action