How to get all users in SharePoint O365 with Rest API?

Question

How to get all users in SharePoint O365 with Rest API? For example only the username.

Answer 1

Try below code:

$.ajax({
    url: "https://sitecollectionurl/_api/search/query?querytext='*'&sourceid='B09A7990-05EA-4AF9-81EF-EDFAB16C4E31'&selectproperties='AccountName'&rowlimit='500'",
    method: "GET",
    headers: { "Accept": "application/json; odata=verbose" },
    success: function (data) {
        console.log(data);
    },
    error: function (data) {
        console.log(data);
    }
}); 

I am using the Search rest api with people source.

Here, i am using the search rest api with people results source to get data from search instead of directly query the user profiles as it give better performance.

If you are using this approach, then Sharepoint search has a default "rowlimit" of 500, so you need to do pagination to get more than 500 profiles as below

SharePoint REST API call with more than 500 rows