How to Log in to Office 365 Employee Email for the First Time Follow these instructions to log in to your Office 365 account for the first time. Step 1 Go to mail.gmu.edu and click Employee Email. Step 2 Log in with your NetID and Patriot Pass Password. Step 3 Select your Language and Time zone. Congratulations! You can now use your Office 365 mailbox. Last modified: September 17, 2020