Within the following article we will go over the steps to create a Office 365 Distribution group.
To begin, open a new web browser and navigate to portal.microsoftonline.com
Once you have logged in, click on Admin from the top right hand side of the screen. From the drop down menu, click on Exchange.
Within the Exchange Admin Center, make sure that you are within the Recipients section, next click on Groups within the middle pane.
Click Add, and select Distribution Group.
From the window that appears, you will be asked to enter a Display Name, Alias, Email Address and a description.
Scrolling down the page, you will find sections for Owner and Members Section. If you are not going to be the owner of this distribution group, click on Add and select the user who will be managing this Distribution Group. From here, you can also add the Members to the Group.
If the Distribution group you are creating is going to be an Internal Distribution Group, you go ahead and stop reading as you have finished. But if this Distribution Group is going to allow External emails to be sent to it, please continue reading further.
To allow External Senders to send emails to your new Distribution Group, you’ll want to double click your Distribution Group. From the window that appears click on Delivery Management, which is located on the left hand side.
Within the Delivery Management Section, click the radio button next to “Senders inside and outside of my organization” and click Save.
Additionally, if you want to limit the people who can send Emails to this distribution group, you can go add them to the bottom section within Delivery Management.