In Gmail Go to settings(Gear icon)
Click See all settings
Click Accounts and Import
Scroll to Send mail as.
Click on edit info on your “@monarchroofing.biz” account.
If it is not there then you need to add your “@monarchroofing.biz” account.
Click Next Step
Put in the settings below with your new password.
SMTP Settings
Server: smtp.office365.com
Port: 587
Secured connection using TLS
Make sure your “@monarchroofing.biz” account is set to Default.
Click save changes. Done
Then go to https://outlook.office.com/mail/options/mail/forwarding
Click to enable forwarding and click on Keep copy.
Enter in the Gmail account
Then Click Save.