Enable-MailUser

Reference

Module:: ExchangePowerShell

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

This cmdlet is available only in on-premises Exchange.

Use the Enable-MailUser cmdlet to mail-enable existing users that aren't already mail-enabled.

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

Syntax

Enable-MailUser
      [-Identity] <UserIdParameter>
      -ExternalEmailAddress <ProxyAddress>
      [-Alias <String>]
      [-Confirm]
      [-DisplayName <String>]
      [-DomainController <Fqdn>]
      [-MacAttachmentFormat <MacAttachmentFormat>]
      [-MessageBodyFormat <MessageBodyFormat>]
      [-MessageFormat <MessageFormat>]
      [-PrimarySmtpAddress <SmtpAddress>]
      [-UsePreferMessageFormat <Boolean>]
      [-WhatIf]
      [<CommonParameters>]

Enable-MailUser
      [-Identity] <UserIdParameter>
      [-ExternalEmailAddress <ProxyAddress>]
      [-Alias <String>]
      [-Confirm]
      [-DisplayName <String>]
      [-DomainController <Fqdn>]
      [-PrimarySmtpAddress <SmtpAddress>]
      [-WhatIf]
      [<CommonParameters>]

Description

The Enable-MailUser cmdlet mail-enables existing users by adding the email attributes that are required by Exchange. Mail users are visible to the other *-MailUser cmdlets.

Mail users have email addresses and accounts in the Exchange organization, but they don't have Exchange mailboxes. Email messages sent to mail users are delivered to the specified external email address.

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

Enable-MailUser -Identity John -ExternalEmailAddress john@contoso.com

This example mail-enables user John with the external email address john@contoso.com.

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

-Confirm

The Confirm switch specifies whether to show or hide the confirmation prompt. How this switch affects the cmdlet depends on if the cmdlet requires confirmation before proceeding.

Destructive cmdlets (for example, Remove-* cmdlets) have a built-in pause that forces you to acknowledge the command before proceeding. For these cmdlets, you can skip the confirmation prompt by using this exact syntax: -Confirm:$false.
Most other cmdlets (for example, New-* and Set-* cmdlets) don't have a built-in pause. For these cmdlets, specifying the Confirm switch without a value introduces a pause that forces you acknowledge the command before proceeding.

Type:	SwitchParameter
Aliases:	cf
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

-DisplayName

The DisplayName parameter specifies the display name of the mail user. The display name is visible in the Exchange admin center and in address lists. The maximum length is 256 characters. If the value contains spaces, enclose the value in quotation marks (").

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

-DomainController

The DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory. You identify the domain controller by its fully qualified domain name (FQDN). For example, dc01.contoso.com.

Type:	Fqdn
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

-ExternalEmailAddress

The ExternalEmailAddress parameter specifies an email address outside the organization. Email messages sent to the mail-enabled user are sent to this external address.

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

-Identity

The Identity parameter specifies the user that you want to mail-enable. You can use any value that uniquely identifies the user. For example:

Name
Distinguished name (DN)
Canonical DN
GUID

Type:	UserIdParameter
Position:	1
Default value:	None
Required:	True
Accept pipeline input:	True
Accept wildcard characters:	False
Applies to:	Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019

-MacAttachmentFormat

The MacAttachmentFormat parameter specifies the Apple Macintosh operating system attachment format to use for messages sent to the mail contact or mail user. Valid values are:

BinHex (This is the default value)
UuEncode
AppleSingle
AppleDouble

The MacAttachmentFormat and MessageFormat parameters are interdependent:

MessageFormat is Text: MacAttachmentFormat can be BinHex or UuEncode.
MessageFormat is Mime: MacAttachmentFormat can be BinHex, AppleSingle or AppleDouble.

Type:	MacAttachmentFormat
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

-MessageBodyFormat

The MessageBodyFormat parameter specifies the message body format for messages sent to the mail contact or mail user. Valid values are:

Text
Html
TextAndHtml (This is the default value)

The MessageFormat and MessageBodyFormat parameters are interdependent:

MessageFormat is Mime: MessageBodyFormat can be Text, Html or TextAndHtml.
MessageFormat is Text: MessageBodyFormat can only be Text.

Type:	MessageBodyFormat
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

-MessageFormat

The MessageFormat parameter specifies the message format for messages sent to the mail contact or mail user. Valid values are:

Text
Mime (This is the default value)

The MessageFormat and MessageBodyFormat parameters are interdependent:

MessageFormat is Mime: MessageBodyFormat can be Text, Html or TextAndHtml.
MessageFormat is Text: MessageBodyFormat can only be Text.

Therefore, if you want to change the MessageFormat parameter from Mime to Text, you must also change the MessageBodyFormat parameter to Text.

Type:	MessageFormat
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

-PrimarySmtpAddress

The PrimarySmtpAddress parameter specifies the primary return email address that's used for the recipient.

By default, the primary address is the same as the ExternalEmailAddress parameter value.

If you use the PrimarySmtpAddress parameter to specify the primary email address, the command sets the EmailAddressPolicyEnabled property of the mail user to False, which means the email addresses of the mail user aren't automatically updated by email address policies. We recommend that you don't set the primary email address to a value other than the ExternalEmailAddress unless you're in a cross-forest scenario.

Type:	SmtpAddress
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

-UsePreferMessageFormat

The UsePreferMessageFormat specifies whether the message format settings configured for the mail user or mail contact override the global settings configured for the remote domain or configured by the message sender. Valid value are:

$true: Messages sent to the mail user or mail contact use the message format that's configured for the mail user or mail contact.
$false: Messages sent to the mail user or mail contact use the message format that's configured for the remote domain (the default remote domain or a specific remote domain) or configured by the message sender. This is the default value.

Type:	Boolean
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

-WhatIf

The WhatIf switch simulates the actions of the command. You can use this switch to view the changes that would occur without actually applying those changes. You don't need to specify a value with this switch.

Type:	SwitchParameter
Aliases:	wi
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

Inputs

Input types

To see the input types that this cmdlet accepts, see Cmdlet Input and Output Types. If the Input Type field for a cmdlet is blank, the cmdlet doesn't accept input data.

Outputs

Output types

To see the return types, which are also known as output types, that this cmdlet accepts, see Cmdlet Input and Output Types. If the Output Type field is blank, the cmdlet doesn't return data.

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