Log into Office 365 as admin
- Navigate to Exchange
- Click on recipients
- Click the 3 dots for more and Export data to a .CSV file
You are then going to see a pop up window, just chose 'Email Address' and 'Email Addresses' (not alias) and click export
Once exported you can either transfer the data to a TXT file and import into EveryCloud's control panel directly or just import the .csv file directly.