Set notifications

Setting notifications is a great way to stay connected. Set notifications so you can stay up-to-date on your conversations and never miss an important update.

Set notifications

Select the Settings icon, and then select Edit Settings.
Select the Notifications tab.
Under Email me when, select when you want to receive email on new activity.
Select the Groups that you want to receive an email about, when there’s new activity in that group.
Select Save.

Source: Microsoft