If you have any problem with Microsoft Account, You should Contact Microsoft support regarding your Office 365 Setup or Outlook.com email setup.
If you are using working or school account of Office 365 for business or exchange based accounts, then you need to contact the admin of office 365.
To set up the email account in Android Email App (Gmail), you need to follow this process
How to Set Up Email in Android Email App?
Open the Gmail App.
Tap the menu icon in the upper left corner > Settings > Add account > Exchange and Office 365.
Enter your full email address and tap Next.
Enter your password and tap Next.
Follow the prompts you get like sync setting & display name.
If you are using office 365 for business, you may be asked to give additional security control. In this case, choose Activate.
Go to your inbox.
If you see an email that says “Action Required to Sync,” open it and tap Use another Mail app instead.
If you don’t see this message and your emails are syncing, skip this step.
If you see a notification that reads “Unable to sync calendar and contacts,” tap it. Then tap Allow to give access and you’re done!
for more information & office support, visit : www.office.com/setup.