To set up and manage email through Exchange Online, log in to portal.office.com using your Microsoft 365 admin credentials. Navigate to the Admin center and select Exchange under Admin Centers. Use the Exchange admin center to configure settings like mailboxes, distribution lists, and mail flow rules. For user mailboxes, go to Recipients > Mailboxes, then add or modify accounts. Adjust policies under Mail Flow for spam and email routing. Manage mobile access via Mobile Devices and retention policies in Compliance Management. Ensure DNS records are configured for your domain to route emails properly. Regularly review and monitor settings for optimal