Use Business Central without Outlook
Business Central has deep integration with Microsoft 365, and you can use Business Central as your business inbox in Outlook. But if you don't have Outlook, you can work with Business Central in the browser or on your mobile device.
Sending email
You can send documents such as invoices as email using your business email address. From your Role Center, you can access an assisted setup guide that helps you set up email. If you don't use a Microsoft 365 email account, you must specify technical information about your mail server. If you don't have this information available, please contact your IT support staff.
See also
Getting Ready for Doing Business
Use Business Central as your Business Inbox in Outlook
Getting Business Central on my Mobile Device
Send Documents by Email