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How to Email All Employees Using a Microsoft 365 Dynamic Group

Kushani NimanthikaKushani Nimanthika Nov 3, 2026 870 views

Question details

The user needs to send organization-wide emails automatically by configuring a Microsoft 365 dynamic group that includes all employees without requiring manual updates.

How to Email All Employees Using a Microsoft 365 Dynamic Group
Product
Microsoft 365
Device & OS
not provided
Scenario
Setting up organization-wide email communication while avoiding the manual maintenance of adding or removing employees from the mailing list.
Observed behavior
Needs to create a dynamic group with precise membership rules that automatically include all current and future employees while distinguishing them from guest accounts.
Before you start

Ensure you have Exchange Administrator or Global Administrator privileges in Microsoft 365, and verify that your organization has the necessary Azure AD Premium licenses to use dynamic groups.

Solution 1Recommended

Create a Dynamic Distribution Group in the Exchange Admin Center

Set up a dynamic distribution group using membership rules to automatically route emails to users matching specific attributes, such as account type.

Dynamic distribution groups query user attributes every time an email is sent to the group. By setting the rule to include only internal members, you guarantee that all current employees receive the email while external guests are securely excluded.

1
Access the Exchange Admin Center

Log in to the Microsoft 365 admin center, expand the left navigation menu, and click on 'Exchange' under Admin centers.

2
Navigate to Groups

In the Exchange admin center, go to 'Recipients' and then click on 'Groups'. Select the 'Dynamic distribution list' tab.

3
Add a New Group

Click on 'Add a group' and choose 'Dynamic distribution' as the group type. Enter a clear name, such as 'All Employees', and provide a brief description.

4
Define Membership Rules

Under the 'Users' setup phase, define the membership criteria. To include all regular employees and distinguish them from guests, set the rule so that 'User type' equals 'Member' (or specify your organization's custom department/company attributes).

5
Save and Process

Review your group settings and click 'Create group'. The system will take some time to calculate the initial membership before you can send your first organization-wide email.

Create a Dynamic Distribution Group in the Exchange Admin Center
Membership Calculation Time: Depending on the size of your organization's directory, it can take up to two hours for the dynamic group's membership list to be fully calculated and updated in the system.
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  1. 1. Download the Installer: Visit the official WPS Office website and download the free installer for your operating system.
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  3. 3. Open and Edit Files: Employees can instantly open, edit, and collaborate on any Microsoft Office email attachments using WPS Office.
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Frequently Asked Questions

Why are guest users receiving emails sent to the dynamic group?

If guests are receiving the emails, your dynamic membership rule is likely too broad. Edit the group's conditions in the Exchange admin center to specify that the 'User type' must equal 'Member', which will filter out guest accounts.

How long does it take for a new employee to be added to the mailing list?

Once a new user account is created with attributes that match your dynamic group's rules, it generally takes between a few minutes and a couple of hours for the system to process the update and include them in the group.

Can I manually add a specific user to a dynamic group?

No, manual additions are not supported for dynamic groups. Membership is strictly determined by Azure AD user properties. To include someone, you must modify their user profile attributes so they meet the group's established rules.