Powershell – The proxy address “smtp:email@domain..com” is already used by the proxy address or LegacyExchangeDN

exchangeexchange-2016powershell

when attempting to remove email addresses of MailContacts in Exchange Server 2016 using the following cmd:

Set-MailContact -Identity "bob" -EmailAddresses @{ remove="SMTP:bob@domain.com" } -EmailAddressPolicyEnabled $false

The command works in most cases, however for some email addresses it fails:

“The proxy address "SMTP:bob@domain.com" is already being used by the proxy addresses or 
LegacyExchangeDN of "domain.com/Exchange/Bob2". Please choose another 
proxy address. “

Running command:

Get-MailContact -Filter "EmailAddresses -eq 'bob@domain.com'"

Outputs the following:

Name                      Alias                                          RecipientType
----                      -----                                          -------------
bob@domain.com            bob?domain.com                                MailContact
Bob.Smith                 Bob.Smith                                     MailContact

What is the best way to remove this email address from the contacts?

Best Answer

I was able to remove the duplicate email address with this method:

 $user = Get-ADObject -LDAPFilter "(name=bob)" -Properties proxyAddresses 
 Set-ADObject $user.DistinguishedName -Remove @{proxyAddresses="SMTP:bob@domain.com"}

Related Solutions

Exchange 2003 Cross-Forest Exchange 2010 MailContacts Migration

I have just completed this for a large org. DL i did through a powershell script to copy email addresses from one forest to another. With contacts i exported them with csvde and painfully put them back into groups. This was due to the org OU structure changing. Let me know how you go.

Powershell 2: How to find arbitrary object in AD having a specific email address

Note that the "mail" attribute is not the only place where an email address may be located. There is also a multi-valued attribute "proxyAddresses", where additional email addresses may be assigned to an object.

Someone has created a script here: (requires the free Quest AD cmdlet)

http://poshcode.org/1594

    Param (
    [Parameter(Mandatory=$true,
        Position=0,
        ValueFromPipeline=$true,
        HelpMessage="Enter SMTP address to search for in Active-Directory."
    )]
    [string]$objSMTP
    )
Function Get-ProxyAddresses ([string]$Address){
$objAD = $null
$objAD = Get-QADObject -LdapFilter "(proxyAddresses=*$Address*)" -IncludeAllProperties -SizeLimit 0 -ErrorAction SilentlyContinue
Write-Output $objAD
}#Close Function
#Validate Quest PSSnapin is loaded
Add-PSSnapin -Name Quest.ActiveRoles.ADManagement -ErrorAction SilentlyContinue
#Run Function to search AD for SMTP address
$Results = $null
$Results = Get-ProxyAddresses -Address $objSMTP | Select-Object Name,DisplayName,ObjectClass,Email,AccountisDisabled,AccountisLockedOut,MailNickName,LegacyExchangeDN -ErrorAction SilentlyContinue
IF($Results -eq $null){
Write-Host ""
Write-Host "No Object Found with .attribute[proxyAddress] containing $objSMTP."}
Else{$Results | Format-List *}
#End

Best Answer

Related Solutions

Exchange 2003 Cross-Forest Exchange 2010 MailContacts Migration

Powershell 2: How to find arbitrary object in AD having a specific email address

Related Topic