CAN’T OPEN OUTLOOK ON ANDROID

I HAVE FOLLOWED YOUR SPECIFIC INSTRUCTIONS, AND ANDROIDS AS WELL, AND KEEP GETTING MESSAGE "THAT PASSWORD IS INCORRECT. BE SURE YOU'RE USING THE PASSWORD FOR YOUR MICROSOFT ACCOUNT." THE PASSWORD IS CORRECT!  IT IS SAME ONE I USE ON MY MACBOOK.  I HAVE TRIED EVERYTHING AND GET SAME ANSWER RE PW????  WHAT IS WRONG?  I SEE ON THE INTERNET THAT THIS IS A COMMON PROBLEM AS IT RELATES TO ANDROID.  MY PHONE IS AN ANDROID HD, BRAND NEW!  HELP!!!