Today we will talk in depth about Distribution groups in Exchange Online 2013 .We will see how we create a Distribution Group , What are the default Settings and how they can be changed . be noted that by default when Created Distribution Groups do not allow Email from External domains to be sent to it .
Here is the list of screen shots :
With this the DG is created.
As you can see here , by default ,you cannot receive Emails from External Domain:
below Steps Explain :
Now ,change the option and you will receive Emails from External Domain
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