New-DynamicDistributionGroup

Reference

Module:: ExchangePowerShell

Applies to:: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection

This cmdlet is available in on-premises Exchange and in the cloud-based service. Some parameters and settings may be exclusive to one environment or the other.

Use the New-DynamicDistributionGroup cmdlet to create dynamic distribution groups. A dynamic distribution group queries mail-enabled objects and builds the group membership based on the results. The group membership is recalculated whenever an email message is sent to the group.

For information about the parameter sets in the Syntax section below, see Exchange cmdlet syntax.

Syntax

New-DynamicDistributionGroup
   [-Name] <String>
   -IncludedRecipients <WellKnownRecipientType>
   [-Alias <String>]
   [-ArbitrationMailbox <MailboxIdParameter>]
   [-ConditionalCompany <MultiValuedProperty>]
   [-ConditionalCustomAttribute1 <MultiValuedProperty>]
   [-ConditionalCustomAttribute10 <MultiValuedProperty>]
   [-ConditionalCustomAttribute11 <MultiValuedProperty>]
   [-ConditionalCustomAttribute12 <MultiValuedProperty>]
   [-ConditionalCustomAttribute13 <MultiValuedProperty>]
   [-ConditionalCustomAttribute14 <MultiValuedProperty>]
   [-ConditionalCustomAttribute15 <MultiValuedProperty>]
   [-ConditionalCustomAttribute2 <MultiValuedProperty>]
   [-ConditionalCustomAttribute3 <MultiValuedProperty>]
   [-ConditionalCustomAttribute4 <MultiValuedProperty>]
   [-ConditionalCustomAttribute5 <MultiValuedProperty>]
   [-ConditionalCustomAttribute6 <MultiValuedProperty>]
   [-ConditionalCustomAttribute7 <MultiValuedProperty>]
   [-ConditionalCustomAttribute8 <MultiValuedProperty>]
   [-ConditionalCustomAttribute9 <MultiValuedProperty>]
   [-ConditionalDepartment <MultiValuedProperty>]
   [-ConditionalStateOrProvince <MultiValuedProperty>]
   [-Confirm]
   [-DirectMembershipOnly <Boolean>]
   [-DisplayName <String>]
   [-DomainController <Fqdn>]
   [-ModeratedBy <MultiValuedProperty>]
   [-ModerationEnabled <Boolean>]
   [-OrganizationalUnit <OrganizationalUnitIdParameter>]
   [-PrimarySmtpAddress <SmtpAddress>]
   [-RecipientContainer <OrganizationalUnitIdParameter>]
   [-SendModerationNotifications <TransportModerationNotificationFlags>]
   [-WhatIf]
   [<CommonParameters>]

New-DynamicDistributionGroup
   [-Name] <String>
   -RecipientFilter <String>
   [-Alias <String>]
   [-ArbitrationMailbox <MailboxIdParameter>]
   [-Confirm]
   [-DirectMembershipOnly <Boolean>]
   [-DisplayName <String>]
   [-DomainController <Fqdn>]
   [-ModeratedBy <MultiValuedProperty>]
   [-ModerationEnabled <Boolean>]
   [-OrganizationalUnit <OrganizationalUnitIdParameter>]
   [-PrimarySmtpAddress <SmtpAddress>]
   [-RecipientContainer <OrganizationalUnitIdParameter>]
   [-SendModerationNotifications <TransportModerationNotificationFlags>]
   [-WhatIf]
   [<CommonParameters>]

Description

The Conditional parameters that are used with the IncludedRecipients parameter are subject to the following limitations:

The EQV operator is used for every property value, as in "Department equals Sales". Wildcards and partial matches aren't supported.
The OR operator is always used for multiple values of the same property, as in "Department equals Sales OR Marketing".
The AND operator is always used for multiple properties, as in "Department equals Sales AND Company equals Contoso".

To create flexible filters that use any available recipient property and that aren't subject to these limitations, you can use the RecipientFilter parameter to create a custom OPATH filter.

You need to be assigned permissions before you can run this cmdlet. Although this topic lists all parameters for the cmdlet, you may not have access to some parameters if they're not included in the permissions assigned to you. To find the permissions required to run any cmdlet or parameter in your organization, see Find the permissions required to run any Exchange cmdlet.

Examples

Example 1

New-DynamicDistributionGroup -Name "Marketing Group" -IncludedRecipients "MailboxUsers,MailContacts" -ConditionalDepartment "Marketing","Sales"

This example creates a dynamic distribution group named Marketing Group that contains all recipients who have a Department field that equals the strings "Marketing" or "Sales". Because we didn't use the OrganizationalUnit or RecipientContainer parameters, the group looks for recipients in the default location (typically, the Users container).

Example 2

New-DynamicDistributionGroup -Name "Washington Management Team" -RecipientFilter "(RecipientTypeDetails -eq 'UserMailbox') -and (Title -like 'Director*' -or Title -like 'Manager*') -and (StateOrProvince -eq 'WA')" -RecipientContainer "North America"

This example creates a dynamic distribution group named Washington Management Team that contains all users in the organizational unit named North America from Washington State whose titles start with "Director" or "Manager".

Parameters

-Alias

The Alias parameter specifies the Exchange alias (also known as the mail nickname) for the recipient. This value identifies the recipient as a mail-enabled object, and shouldn't be confused with multiple email addresses for the same recipient (also known as proxy addresses). A recipient can have only one Alias value. The maximum length is 64 characters.

The Alias value can contain letters, numbers and the following characters:

!, #, %, *, +, -, /, =, ?, ^, _, and ~.
$, &, ', `, {, }, and | need to be escaped (for example -Alias what`'snew) or the entire value enclosed in single quotation marks (for example, -Alias 'what'snew'). The & character is not supported in the Alias value for Microsoft Entra Connect synchronization.
Periods (.) must be surrounded by other valid characters (for example, help.desk).
Unicode characters U+00A1 to U+00FF.

When you create a recipient without specifying an email address, the Alias value you specify is used to generate the primary email address (alias@domain). Supported Unicode characters are mapped to best-fit US-ASCII text characters. For example, U+00F6 (ö) is changed to oe in the primary email address.

If you don't use the Alias parameter when you create a recipient, the value of a different required parameter is used for the Alias property value:

Recipients with user accounts (for example, user mailboxes, and mail users): The left side of the MicrosoftOnlineServicesID or UserPrincipalName parameter is used. For example, helpdesk@contoso.onmicrosoft.com results in the Alias property value helpdesk.
Recipients without user accounts (for example, room mailboxes, mail contacts, and distribution groups): The value of the Name parameter is used. Spaces are removed and unsupported characters are converted to question marks (?).

If you modify the Alias value of an existing recipient, the primary email address is automatically updated only in environments where the recipient is subject to email address policies (the EmailAddressPolicyEnabled property is True for the recipient).

The Alias parameter never generates or updates the primary email address of a mail contact or a mail user.

Type:	String
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False
Applies to:	Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection

-ArbitrationMailbox

This parameter is available only in on-premises Exchange.

The ArbitrationMailbox parameter specifies the arbitration mailbox that's used to manage the moderation process for this recipient. You can use any value that uniquely identifies the arbitration mailbox. For example:

Name
Alias
Distinguished name (DN)
Canonical DN
Domain\Username
Email address
GUID
LegacyExchangeDN
SamAccountName
User ID or user principal name (UPN)

Type:	MailboxIdParameter
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False
Applies to:	Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019

-ConditionalCompany

The ConditionalCompany parameter specifies a precanned filter that's based on the value of the recipient's Company property. You can specify multiple values separated by commas.