Open the Office stor in Microsoft Excel and search for 46elks or SMS.
Read our terms of service and accept the requested permissions to install the add-in.
If you don't have an account yet, you can create an account.
Write your SMS text in the add-in window and pick your sender name. For any technical questions such as how long text messages you can send or restrictions with the custom sender ID you can email firstname.lastname@example.org.