Tag Archives: alias

Exchange Online: Adding a secondary e-mail domain to all users

I thought that I would share with you a simple script that will add an email domain to your users. This script is handy if you for example would like to add contoso.info to your already existing contoso.com environment. If you are using the email address aaron@contoso.com you want the script to automatically add aaron@contoso.info.

Please note that the domain name that you are adding first has to be added and verified in your Office 365 tenant.

DirSync version (modifying Active Directory using ADSI): 

$activeDomain = New-Object DirectoryServices.DirectoryEntry
$domain = $activeDomain.distinguishedName
$searcher = [System.DirectoryServices.DirectorySearcher]"[adsi]LDAP://$domain"
$searcher.filter = '(proxyaddresses=*@contoso.com*)'
$result = $searcher.findall()
$users = $result.Path

$users | ForEach-Object {
    $user = [adsi]"$_"
    $proxyaddresses = $user.proxyaddresses.Value | Where-Object { $_ -like 'smtp:*@contoso.com' }
    foreach ($proxyaddress in $proxyaddresses) {
        $newaddress = ($proxyaddress.split ':')[1] -replace '@contoso.com', '@contoso.info'
        $user.proxyaddresses.add("smtp:$newaddress")
    }
    $user.setinfo()
}

Cloud version: 

$cred = Get-Credential -Message 'Please enter your Office 365 admin crendentials'
$O365 = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri 'https://outlook.office365.com/powershell-liveid/' -Credential $cred -Authentication Basic -AllowRedirection 
$importcmd = Import-PSSession $O365 -CommandName @('Get-Mailbox','Set-Mailbox') -AllowClobber

Get-Mailbox -ResultSize Unlimited -Filter { EmailAddresses -like '*@contoso.com' } | Select-Object Identity,EmailAddresses | ForEach-Object {
    $proxyaddresses = $_.EmailAddresses | Where-Object { $_ -like 'smtp:*@contoso.com' }
    foreach ($proxyaddress in $proxyaddresses) {
        $newaddress = ($proxyaddress -split ':')[1] -replace '@contoso.com','@contoso.info'
        Set-Mailbox -Identity $_.Identity -EmailAddresses @{Add="smtp:$newaddress"}    
    }
}

/ Andreas

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Managing Office 365 e-mail addresses easy with PowerShell when using DirSync

In most cases you uninstall your local Exchange server after migrating your e-mail to Exchange Online. If you also choose to implement DirSync you place the administration in your local domain instead of the Office 365 Administration Portal.

This means that there is no longer a GUI tool to handle some of the settings related to your mailboxes. Of course you can keep a machine with your old Exchange 2010 Management Console, but often the reason for moving to the cloud is to reduce the complexity and minimize the number of machines.

We don’t have the same problem with other attributes, for example displayname or phone numbers that you’ll find in Users and Computers or the Administrative Center introduced in Windows Server 2008. It does get a bit trickier when you are about to modify primary email address or add alias addresses.

Currently there are no available GUI tools from Microsoft to handle these types of updates easy (but keep your eyes open, things might change 😉 ). However, there are a few third-party tools to achieve this, unless you want to use the Attribute Editor in Users and Computers, or Adsiedit.

Since I’m a big fan of PowerShell I wanted to build a small set of tools to handle simple changes of email addresses. These functions are easy for you to use in your own scripts.

First of all, a function that lists all email addresses of a user:

function Get-O365AliasAddress {
<#
.SYNOPSIS
    Displays all email addresses assigned to a user.
.PARAMETER Identity
    The user to query.
.EXAMPLE
    Get-O365AliasAddress -Identity user01
.EXAMPLE
    Get-ADUser user01 | Get-O365AliasAddress
.NOTES
    Author: Andreas Lindahl
    Blog: 365lab.net
    Email: andreas.lindahl[at]jsc.se
    The script are provided “AS IS” with no guarantees, no warranties, and they confer no rights.
#>

    [CmdletBinding()]
    param (
        [Parameter(ValueFromPipelineByPropertyName=$true,Mandatory=$True,ValueFromPipeline=$True,
        HelpMessage="The name of the user to get addresses of")]
        [string]$Identity
    )

    Import-Module ActiveDirectory

    $result = @()

    (Get-ADUser -Identity $Identity -Properties proxyAddresses).proxyAddresses | foreach {
        $proxy =  $_.split(":")
        $object = New-Object System.Object
        $object | Add-Member –Type NoteProperty –Name Type –Value $proxy[0]
        $object | Add-Member –Type NoteProperty –Name Address –Value $proxy[1]
        $object | Add-Member –Type NoteProperty –Name IsPrimary –Value ($proxy[0] -ceq $($proxy[0].ToUpper()))
        $result += $object
    }
    return $result
}

Next, a function that adds an alias to an existing user

function Add-O365AliasAddress {
<#
.SYNOPSIS
    Adds an alias address to a user.
.PARAMETER Identity
    The user to modify.
.PARAMETER Address
    The address to add.
.PARAMETER Type
    The type of address. Default is smtp.
.PARAMETER SetAsDefault
    Indicates if the address should be de default address of the user
.EXAMPLE
    Add-O365AliasAddress -Identity user01 -Address test@365lab.net -SetAsPrimary
.NOTES
    Author: Andreas Lindahl
    Blog: 365lab.net
    Email: andreas.lindahl[at]jsc.se
    The script are provided “AS IS” with no guarantees, no warranties, and they confer no rights.
#>

    [CmdletBinding()]
    param (
        [Parameter(ValueFromPipelineByPropertyName=$true,Mandatory=$True,ValueFromPipeline=$True,
        HelpMessage="The name of the user")]
        [string]$Identity,

        [Parameter(Mandatory=$True,
        HelpMessage="The address to add")]
        [string]$Address,

        [Parameter(
        HelpMessage="The type of the address to add")]
        [string]$Type="smtp",

        [Parameter(
        HelpMessage="Indicates that the address will be set as the default address")]
        [switch]$SetAsDefault
    )

    Import-Module ActiveDirectory

    $Type = $Type.ToLower()

    $defaultaddress = ''
    $proxyaddresses = ''
    $proxyaddress = ''

    #Get all existing proxyAddresses of the same type
    $proxyaddresses = (Get-ADUser -Identity $Identity -Properties proxyAddresses).proxyAddresses | where-object { $_ -like "$Type*" }

    #Get current default address of this type
    foreach ($proxyaddress in $proxyaddresses) {
        $pa = $proxyaddress.split(':')
        if ($pa[0] -ceq $pa[0].ToUpper()) {
            $defaultaddress = $proxyaddress
        }
    }

    #If this is the first address, it will be the default
    if ($proxyaddresses.count -eq 0) {
        $SetAsDefault = $true
    }

    if ($SetAsDefault) {

        #New default address to set. Start by removing the old one, but keep it as alias.
        if ($defaultaddress) {
            $pa = $defaultaddress.split(':')
            $newdefaultaddress = "$($pa[0].ToLower()):$($pa[1])"
            Set-ADUser -Identity $Identity -Remove @{proxyaddresses=$defaultaddress} -Add @{proxyaddresses=$newdefaultaddress}
        }

        #Set new default address. In case it already exists, remove it first (it might already be used as alias)
        if ($Type -eq 'SMTP') {
            Set-ADUser -Identity $Identity -Remove @{proxyaddresses="$($Type.ToLower()):$Address" } -Add @{proxyaddresses="$($Type.ToUpper()):$Address" } -EmailAddress $Address
        } else {
            Set-ADUser -Identity $Identity -Remove @{proxyaddresses="$($Type.ToLower()):$Address" } -Add @{proxyaddresses="$($Type.ToUpper()):$Address" }
        }

    } else {
        #Just add the new address
        Set-ADUser -Identity $Identity -Add @{proxyaddresses="$($Type):$Address" }
    }
}

Finally we also need a script to delete addresses

function Remove-O365AliasAddress {
<#
.SYNOPSIS
    Removes an alias address from a user.
.PARAMETER Identity
    The user to modify.
.PARAMETER Address
    The address to remove.
.PARAMETER Type
    The type of address. Default is smtp.
.EXAMPLE
    Remove-O365AliasAddress -Identity user01 -Address test@365lab.net
.NOTES
    Author: Andreas Lindahl
    Blog: 365lab.net
    Email: andreas.lindahl[at]jsc.se
    The script are provided “AS IS” with no guarantees, no warranties, and they confer no rights.
#>

    [CmdletBinding()]
    param (
        [Parameter(ValueFromPipelineByPropertyName=$true,Mandatory=$True,ValueFromPipeline=$True,
        HelpMessage="The name of the user")]
        [string]$Identity,

        [Parameter(Mandatory=$True,
        HelpMessage="The address to remove")]
        [string]$Address,

        [Parameter(
        HelpMessage="The type of the address to remove")]
        [string]$Type="smtp"

    )

    Import-Module ActiveDirectory

    $Type = $Type.ToLower()
    $defaultaddress = ''
    $newdefaultaddress = ''
    $proxyaddresses = ''

    #Get all existing proxyAddresses of the same type
    $proxyaddresses = (Get-ADUser -Identity $Identity -Properties proxyAddresses).proxyAddresses | where-object { $_ -like "$Type*" }

    #Get current default address of this type
    foreach ($proxyaddress in $proxyaddresses) {
        $pa = $proxyaddress.split(':')
        if ($pa[0] -ceq $pa[0].ToUpper()) {
            $defaultaddress = $proxyaddress
        }
    }

    if ($defaultaddress -eq "$($Type):$Address") {
        #We are trying to remove the default address. Now it becomes a bit tricky...
        #First, find the next address of the same type that we can use as default address
        foreach ($proxyaddress in $proxyaddresses) {
            if ($proxyaddress -ne "$($Type):$Address") {
                $newdefaultaddress = $proxyaddress
                break
            }
        }
    }

    #Now we can remove the address
    Set-ADUser -Identity $Identity -Remove @{proxyaddresses="$($Type):$Address"}
    if ($Type -eq 'smtp' -and $defaultaddress -eq "$($Type):$Address") {
        Set-ADUser -Identity $Identity -Clear mail
    }

    if ($newdefaultaddress) {
        #Set $newdefaultaddress as new default address
        Write-Warning "New default address set: $newdefaultaddress"
        Add-O365AliasAddress -Identity $Identity -Address $newdefaultaddress.split(":")[1] -Type $Type -SetAsDefault
    }
}

Now we can play with these functions:

O365AliasAddress

I have put together a PowerShell Module for you to import. Just load it with the Import-Module cmdlet.

Import-Module O365ProxyAddresses

The module can be downloaded here.

I hope that you will find these functions useful in your daily user administration tasks. Please leave your comments below and feel free to suggest improvements.

Happy coding!

/ Andreas