EEEKB article--Go to Exchange Online Service 16 in Office 365 How to manage mail-enabled security groups

Mail-enabled security groups and distribution groups differ in the ability to assign users permissions to SharePoint online through security groups. Therefore, only the mail-enabled security groups that you need to use for a subset of users by assigning the same SharePoint Online permissions and receiving bulk messages. Otherwise, if only users receive mass mailings, it is recommended that you still use distribution groups.
I. Create a mail-enabled security group
Although you can create a security group from the Office 365 Admin Center, the security groups that you create do not mail-enable. To create a mail-enabled security group, you need to do so through the Exchange Admin Center or PowerShell.
1. Use the Exchange Admin Center to create a mail-enabled security group
in the Exchange Admin Center window, click Recipients in the navigation bar, select groups in the right window navigation bar, and click the Add "+" button , select "Security Group" from the drop-down menu.
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In the new Security Group window, define the display name and alias for the distribution group. As with user mailboxes, aliases directly affect the e-mail address of the security group.
When you create a security group, you can add members to it, which must be recipient objects for Exchange online, or you can modify the configuration and management of the security group after completion. Additionally, if you select Add owners as members for a group, the group receives the message and the recipient in its owner list can receive the message at the same time, and the creator of the security group is the default owner of the list. Click "Save" to complete the creation of the distribution group.

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2, create a distribution group using PowerShell
After you connect to Exchange online through PowerShell, you can New-distributiongroup-name " File Management Group "-alias Fileadmins-type security
Get-distributiongroup" file Management Group "| FL name,recipienttypedetails, PrimarySmtpAddress
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Also in the EAC, you can see that a security group created through PowerShell already exists.

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Ii. Configuring and Managing Security Groups
1. Manage security groups in the Exchange Admin Center.
In the EAC, navigate to recipients, navigate to the Groups tab, select the security group you want to configure, click the Pen button, and open the Security Group Properties window.
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You can see that the list of options and distribution groups are identical, as in the General tab, you can redefine the display name and alias, and the e-mail address of the distribution group. In addition, you can determine whether to have the security group appear in the address list. You can refer to the easy-to-use article-the Exchange Online service 14 in Office 365 How to manage distribution groups for Exchange online.
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2. Manage and maintain security groups through PowerShell
After you connect to Exchange online through PowerShell, you can use theGet-distributiongroupView all the security groups in an existing organization.
get-distributiongroup-resultsize unlimited-filter {(recipienttypedetails-eq ' Mailuniversalsecuritygroup ')}
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If you need to modify an existing mail-enabled security group, you canSet-distributiongroupRealize. For example, modify the mail address of a mail-enabled security group.
set-distributiongroup "file Management Group"-emailaddresses Smtp:[email Protected],smtp:[email protected] remind you not to spam ads!
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Typically, because a security group involves permission assignments, it is generally not used for primary distribution groups and may be used among users within the user group. Therefore, security groups often choose to hide from the recipient address list. If you need to hide the current or left-mail-enabled security group in the recipient address list, you can do so by doing the following:
get-distributiongroup-resultsize unlimited-filter {(recipienttypedetails-eq ' mailuniversalsecuritygroup ') } | Set-distributiongroup-hiddenfromaddresslistsenabled $true
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Verify that the settings are in effect by sampling in the EAC:
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This article is from the "Fat Brother Technology Hall" blog, please be sure to keep this source http://liulike.blog.51cto.com/1355103/1794195

EEEKB article--Go to Exchange Online Service 16 in Office 365 How to manage mail-enabled security groups