Golang Send Mail via office365 smtp

Question

I can send mail with my personal .hotmail email but when I try with my company mail address then the code throws an error. I used gomail package for implementation.

package main

import (
    "crypto/tls"
    "fmt"

    gomail "gopkg.in/mail.v2"
)

func main() {
    m := gomail.NewMessage()
    m.SetHeader("From", "email")
    m.SetHeader("To", "toemail")
    m.SetHeader("Subject", "u.Title")
    m.SetBody("text/html", "u.Message")
    d := gomail.NewDialer("smtp.office365.com", 587, "email", "password")
    d.TLSConfig = &tls.Config{InsecureSkipVerify: true}
    if err := d.DialAndSend(m); err != nil {
        fmt.Errorf(err.Error())     
    }
}

The code throws this error : "5.7.139 Authentication unsuccessful, SmtpClientAuthentication is disabled for the Tenant. Visit https://aka.ms/smtp_auth_disabled for more information. [ZR0P278CA0001.CHEP278.PROD.OUTLOOK.COM]"