Hi All,

We have a few users, where email is being bounced back with a NDR to the senders. Below is what we are receiving.

IMCEAEX-_O=ING+20GROUP_OU=Common+20Administrative+20Group_cn=Recipients_cn=*************

Remote Server returned '550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found'

We've been troubleshooting this and seems like that tehir is a issue with the X.500 address, and found plenty of sites which talk about this.

We've cleared the cache address of users sending emails to user A with the above issue.

We've also followed solutions from the following sites:

https://amagsmb.wordpress.com/2014/03/06/getting-ndr-remote-server-returned-550-5-1-1-resolver-adr-exrecipnotfound-not-found-for-existing-user/

http://mostlyexchange.blogspot.com.au/2007/08/exchange-2007-legacyexchangedn-and-mail.html

http://exchangeitup.blogspot.com.au/2014/07/exchange-2010-bounced-email-error-550.html

and even using this script

    

cls

Function CleanLegacyExchangeDN ([string]$imceaex) {

    #IMCEAEX Example: IMCEAEX-_O=ING+20GROUP_OU=Common+20Administrative+20Group_cn=Recipients_cn=*************"

    $imceaex = $imceaex.Replace("IMCEAEX-","")
    $imceaex = $imceaex.Replace("_","/")
    $imceaex = $imceaex.Replace("+20"," ")
    $imceaex = $imceaex.Replace("+28","(")
    $imceaex = $imceaex.Replace("+29",")")
    $imceaex = $imceaex.Replace("+2E",".")
    $imceaex = $imceaex.Replace("+21","!")
    $imceaex = $imceaex.Replace("+2B","+")
    $imceaex = $imceaex.Replace("+3D","=")
    $regex = New-Object System.Text.RegularExpressions.Regex('@.*')
    $imceaex = $regex.Replace($imceaex,"")
    $imceaex # return object
}

$ExPowerShellPath = $env:ExchangeInstallPath + "bin\RemoteExchange.ps1"

#region "Check Powershell Version and Load in Exchange 2013 Poweshell Snap-In"

if ((Get-Host).Version.Major -eq 1)
{
    Write-Output "$CurrentDate --> Powershell Version 1 is not supported `n" | Add-Content $LogPath
throw "Powershell Version 1 not supported";
}

if (!(Get-Command Get-ExchangeServer -ErrorAction SilentlyContinue))
{
if (Test-Path $ExPowerShellPath)
{
. $ExPowerShellPath
Connect-ExchangeServer -auto
} elseif (Test-Path "C:\Program Files\Microsoft\Exchange Server\bin\Exchange.ps1") {
Add-PSSnapIn Microsoft.Exchange.Management.PowerShell.Admin
.'C:\Program Files\Microsoft\Exchange Server\bin\Exchange.ps1'
} else {
throw "Exchange Management Shell cannot be loaded"
}
}

#endregion


#region "Main"

$CurrentMBXUser = Read-Host "Enter User affected by (UserAccount) "
$IMCEAEXAttrib = Read-Host "Enter the users IMCEAEX, this is found on the NDR "

$userLegacyDNIssue = New-Object PsObject
$userLegacyDNIssue  | add-member MBXAccount $CurrentMBXUser
$userLegacyDNIssue  | add-member IMCEAEX $IMCEAEXAttrib

$exchangeLegDN = CleanLegacyExchangeDN($userLegacyDNIssue.IMCEAEX)
$x500address = "X500:$exchangeLegDN"

    # check what recipient type is
    $recipientType = (Get-Recipient $userLegacyDNIssue.MBXAccount).RecipientType

    # format command appropriately
    switch ($recipientType) {
        "DynamicDistributionGroup" {$command = "Set-DynamicDistributionGroup `"$($userLegacyDNIssue.MBXAccount)`" -EmailAddresses @{Add=`"$x500address`"}"}
        "MailUniversalDistributionGroup" {$command = "Set-DistributionGroup `"$($userLegacyDNIssue.MBXAccount)`" -EmailAddresses @{Add=`"$x500address`"}"}
        "MailUniversalSecurityGroup" {$command = "Set-DistributionGroup `"$($userLegacyDNIssue.MBXAccount)`" -EmailAddresses @{Add=`"$x500address`"}"}
        "UserMailbox" {$command = "Set-Mailbox `"$($userLegacyDNIssue.MBXAccount)`" -EmailAddresses @{Add=`"$x500address`"}"}
        "MailUser" {$command = "Set-MailUser `"$($userLegacyDNIssue.MBXAccount)`" -EmailAddresses @{Add=`"$x500address`"}"}
        "MailContact" {$command = "Set-MailContact `"$($userLegacyDNIssue.MBXAccount)`" -EmailAddresses @{Add=`"$x500address`"}"}
        "PublicFolder" {$command = "Set-MailPublicFolder `"$($userLegacyDNIssue.MBXAccount)`" -EmailAddresses @{Add=`"$x500address`"}"}
    }

    # output command to console
    $command

#endregion

Seems like nothing is working.

Any help on this would be great.

• Edited by maksoy2099 Monday, February 16, 2015 3:02 AM

Hi,

Since the issue only occurs on some specific users, I suggest we compare their AD properties and find difference:

Pease export the following information on both of a good user and a problematic user so that I can compare with them. On the DC\GC server, open Command Prompt, type the commands:

ldifde -f c:\<Name of User>.txt -d "distinguishedName of User"

Here is the detailed steps for getting the distinguishedName of a user:

a. Run the Adsiedit.msc from a command prompt.

b. Expand Domain->DC=domainName,DC=com->CN=Users

c. Right click on CN=the problematic user name, click Properties.

d. Find the attribute distinguishedName attribute. Double click copy the value of it.

Thanks,

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