How to Bulk Update ProxyAddresses Attribute

In this guide, I’m going to show you how to update the ProxyAddresses attribute for single and multiple user accounts. 

Bulk updating the ProxyAddresses is often required when migrating to Office 365, creating new accounts, adding a new domain, and so on. 

To bulk update user accounts you will need to use PowerShell or a third party tool. Don’t worry if you are not familiar with PowerShell as I provide step by step instructions. If you want to skip PowerShell then I’ll show you the GUI tool I created that is easy to use and requires no coding. 

Examples in this guide: 

How to Add ProxyAddresses using PowerShell

In this first example, I’ll show you how to add a ProxyAddresses using PowerShell. 

Using the -add parameter will not remove or update existing addresses, it will just add the additional address you specify. 

I’m going to add a new address to the user account Adrienne.Williams. 

First I’ll run a command to get the users current ProxyAddresses

get-aduser adrienne.williams -Properties ProxyAddresses | select Name, ProxyAddresses

You can see this user has one ProxyAddress. Now I will use the command below to add a second proxyaddress.

Set-ADUser Adrienne.Williams -add @{ProxyAddresses=""}

Now I’ll list the user’s addresses again and you can see the user now has two addresses. 

If you want to add multiple ProxyAddresses at once use this command 

Set-ADUser Adrienne.Williams -add @{ProxyAddresses="," -split ","}

With the above command, you can add as many addresses as you want, just separate each one with a comma. 

How to Replace ProxyAddresses using PowerShell

You can use the -replace parameter to replace the user’s current ProxyAddress value. 

Warning: Using the -replace parameter will replace all addresses with the values you provide. 

Let’s list the user’s current addresses

get-aduser adrienne.williams -Properties ProxyAddresses | select Name, ProxyAddresses

So this user has two addresses listed. I’m going to pretend these addresses are wrong or no longer needed and replace them all. 

Use this command to replace the ProxyAddresses.

Set-ADUser Adrienne.Williams -replace @{ProxyAddresses=""}

Now I’ll check the account.

You can see the -replace command cleared out both addresses and replaced it with the single address. 

If you want to replace the value with multiple address use this command.

Set-ADUser Adrienne.Williams -replace @{ProxyAddresses="," -split ","}

How to Remove ProxyAddresses using PowerShell

You can use the -remove parameter to remove single or multiple addresses. 

Remove single address.

Set-ADUser Adrienne.Williams -remove @{ProxyAddresses=""}

Remove multiple addresses.

Set-ADUser Adrienne.Williams -remove @{ProxyAddresses="," -split ","}

Bulk Add ProxyAddress for Multiple Accounts using PowerShell

To update multiple user accounts you will need to set up a CSV file with a samaccountname column and proxyaddresses column. 

Enter as many proxyaddresses as you need and separate them by a comma.

Here is an example of a CSV file. 

For this example, I’m going to update all the users in the Administrations organizational unit. To list all the users current addresses in an OU run the command below. You will need to change the value of the -SearchBase to the distinguished name of the OU. 

get-aduser -filter * -SearchBase "OU=Administrations,OU=ADPRO Users,DC=ad,DC=activedirectorypro,DC=com" -Properties ProxyAddresses | select Name, ProxyAddresses

You can see two users have proxyaddresses and the rest do not. 

To update these accounts with the information in the CSV file, use the command below. You will need to update the path to your CSV file.

Import-Csv "C:\it\bulk-proxy2.csv" | foreach {Set-ADUser -Identity $_.samaccountname -add @{Proxyaddresses=$_.Proxyaddresses -split ","}}

Now I’ll check the values if they have been updated. 


It looks like all the accounts in the Administrations OU has been updated from the CSV file. 

Bulk Add ProxyAddress for Multiple Accounts using the AD Bulk Update GUI Tool

I often get asked how to bulk modify Active Directory user attributes such as email address, phone number, street address, department, and so on. 

To make this process easy I created the AD Bulk User Update Tool.  This easy to use GUI tool lets you quickly bulk update any user attribute, you can even update multiple attributes at once. 

All you need is a CSV file with the samaccountname and the attribute you want to update. The tool also comes with a CSV template to make the setup even easier. 

In this example, I’ll add proxyAddresses to multiple user accounts.

Step 1. Download CSV Template

Click the “CSV Template” button to download the template.

Edit the CSV template and add the accounts you want to update and the proxyAddresses you want to add for each user.

To add multiple proxyAddresses just separate them with a comma. Below is an example CSV template.

Step 2. Select “Append proxyAddresses” and select your CSV file.

Step 3. Click Run.

Check the logs for errors and verify the accounts have been updated.

How to Update (Replace) Existing ProxyAddresses using GUI Tool

What if you want to update existing proxyAddresses?

No problem.

In the CSV template, add a “new_proxyAddresses” column. The proxyAddresses column will be the target address and the new_proxyAddresses column will be the address to replace it with.

In the above screenshot, the user James.Knutson has the address: and I want to replace it with

In the GUI tool select the “Update existing proxyAddresses” option. Then select your CSV and click run.

After running the tool I’ll check the James Knutson account. You can see below the address has been replaced with

To see more examples of the AD Bulk User tool see the article below.

How to bulk modify active directory user attributes 


If you are using Azure AD connect or using Office 365  then knowing how to bulk update users ProxyAddresses attribute is a must. In this guide, I showed you multiple examples for updating single accounts, adding multiple addresses and bulk updating a list of accounts from a CSV file

PowerShell is a great tool for making mass changes to Active Directory users but for those that want a GUI option, the AD Bulk User Update tool is a simple and easy solution. 

Let me know in the comments below if you have any questions. 

Recommended Tool: Active Directory Pro Toolkit

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28 thoughts on “How to Bulk Update ProxyAddresses Attribute”

  1. The above multiple is not working with either the script or GUI Tool, script adds the value “Microsoft.ActiveDirectory.Manamgement.ADPropertyValueCollection”, GUI Tool adds all values on the same line.

    • Avatar photo

      When did you download the GUI tool? I recently updated it to fix the issue of putting the values on the same line. If you log in you can download the latest version.

  2. Hi!
    When I use the command:

    Import-Csv “C:\Temp\users.csv” | foreach {Set-ADUser -Identity $_.samaccountname -add @{Proxyaddresses=$_.Proxyaddresses -split “,”}}

    I got the following error:
    Set-ADUser : Cannot validate argument on parameter ‘Identity’. The argument is null. Provide a valid value for the
    argument, and then try running the command again.
    At line:1 char:64
    + … \users.csv” | foreach {Set-ADUser -Identity $_.samaccountname -add @{ …
    + ~~~~~~~~~~~~~~~~~
    + CategoryInfo : InvalidData: (:) [Set-ADUser], ParameterBindingValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationError,Microsoft.ActiveDirectory.Management.Commands.SetADUser

    The csv file is prepared in the same way you described above. What am I doing wrong?

    • Avatar photo

      Looks like I have a type in my CSV. Change the CSV header from samacountname to samaccountname.

    • I get the exact same error.

      • Try to add -delimiter paramenter in import-csv:
        Import-Csv “C:\temp\proxy_update_test0.csv” –Delimiter “;” | foreach-object….
        seems to solve problem


  3. Very useful article. Thank you!

  4. Bulk update using CSV file fails. It seems parameter ‘Identity’ is missing:

    “Set-ADUser : Cannot validate argument on parameter ‘Identity’. The argument is null.”

  5. Purchased your tool, but it doesn’t work. I have created the CSV exactly like you propose, and the tool can read the attributes in the file – but when I run it, I’m just told that it cannot update the attributes.

    • Avatar photo

      Hi Michael,

      I sent you an updated version. Try it out and let me know if you still have issues.

      • Hi Robert, Can I get the updated version of user export / bulk update ? I need to update proxyAddresses .

        • Avatar photo

          Yup, I sent you a link.

          • Hi Robert. Can you please send me the link as well?

          • Avatar photo

            Hi Jhon,

            What link?

  6. Planning to do a bulk roll out of 300 users. Can I update the spreadsheet and add a “mail” attribute? The email address isn’t using the same UPN suffix as the login domain so I would like to add the emails that will be used.

    • Avatar photo

      Sure you can modify the script and spreadsheet to add whatever you need.

  7. If i run manual PS … \users.csv” | foreach {Set-ADUser -Identity $_.samaccountname -add @{ …
    it is successful in adding the proxyaddresses from the csv
    When i use the ADBulkUserUpdate tool it removes all existing addresses and puts the csv proxyaddresses as a single entry when i use the same csv

    • Avatar photo

      I’ve updated the tool to append the proxyaddresses instead of removing and putting only what’s in the CSV. If you need to remove values you can add the word remove to the csv.

  8. Hello, it states that you can remove proxy addresses by adding the word remove. I’ve tried updating, but it doesn’t seem to remove the proxy addresses. Do you have the syntax?

  9. Hello,
    I’ve find what is the issue with the error “Cannot validate argument on parameter ‘Identity’. The argument is null.”
    you must create a CSV with the comma “,” separator not “;”
    and then change the comma separator between each smtp address by another character instead of “,” in my case I’ve used the character “&”, and then the command worked well.
    So here is the command line: Import-Csv “C:\it\bulk-proxy2.csv” | foreach {Set-ADUser -Identity $_.samaccountname -add @{Proxyaddresses=$_.Proxyaddresses -split “&”}}

  10. Thanks for this cool manual, but i run into different issues…
    the most i was able to solve but one is pretty hard…

    if i have multiple smtp adrresses for example:,
    it will only set the first e-mail address but not all the others….
    any idea how i could fix this?

    thanks and regards

    • Not sure if you got this figured out but I would say that the second one is a violation because it doesnt have a proxy type. In this example we user SMTP then we separate the Proxy type from the address. So you can have many others SIP, X500, SMTP etc. So change your code to be,

  11. Hi guys
    if you want to insert multiple addresses in proxyadresses field , I modified the code and the csv like this:



    Import-Csv “C:\temp\deploy.csv” -Delimiter “&” | foreach {Set-ADUser -Identity $_.samaccountname -add @{Proxyaddresses=$_.Proxyaddresses -split “&”}
    Set-ADUser -Identity $_.samaccountname -add @{Proxyaddresses=$_.Proxyaddresses2 -split “&”}
    Set-ADUser -Identity $_.samaccountname -add @{Proxyaddresses=$_.Proxyaddresses3 -split “&”}}

    with this , the code enter for each user 3 times to put the diferents proxyaddresses..

    I hope someone will find it useful!

  12. This was very useful, i need to readdress many proxy addresses as part of an acquisition and using EAP is not going to work.

    What i noticed was that i ended up with two Primary SMTP addresses, so need to figure a way to overwrite the original primary SMTP.

    • Avatar photo

      With the GUI tool, you can use the remove option to remove all the proxy addresses then add them back with only the addresses needed. I’ve had several customers use this method.

  13. Hi Robert,

    This tutorial is only for on-premise, right?
    Is there a way to remove an address in “ProxyAddresses” for the Azure AD PowerShell module? I have the feeling it is locked and only modified in license updates.
    The user does not have a license (and therefore no mailbox) so the Exchange Online Powershell module is not an option.

    I could just add a license to the user and then change the E-Mail aliases in the EAC but then it would still be billed after I revoke the license?

    • Avatar photo

      Yes, this tutorial is for on-premise.


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