a PowerShell script that can help you quickly identify any duplicate proxy addresses across all users in your Azure AD environment.

[crayon-678056b30b1e6088415454 inline=”true” ]# Import the AzureAD module (or Microsoft.Graph if using that module)
Import-Module AzureAD  # Or ‘Import-Module Microsoft.Graph’ if using the Microsoft Graph module

# Connect to Azure AD
Connect-AzureAD

# Get all users from Azure AD and their proxyAddresses
$users = Get-AzureADUser -All $true | Select-Object ObjectId, UserPrincipalName, ProxyAddresses

# Flatten the ProxyAddresses and identify duplicates
$allProxyAddresses = @()
foreach ($user in $users) {
    if ($user.ProxyAddresses) {
        $allProxyAddresses += $user.ProxyAddresses
    }
}

# Group by ProxyAddress and filter duplicates
$duplicateProxyAddresses = $allProxyAddresses | Group-Object | Where-Object { $_.Count -gt 1 }

# Output duplicate proxy addresses
if ($duplicateProxyAddresses) {
    $duplicateProxyAddresses | ForEach-Object {
        $proxy = $_.Name
        $occurrences = $_.Count
        $duplicateUsers = $users | Where-Object { $_.ProxyAddresses -contains $proxy }
        
        Write-Host “Duplicate ProxyAddress: $proxy occurs $occurrences times”
        foreach ($user in $duplicateUsers) {
            Write-Host “`tUser: $($user.UserPrincipalName) – ObjectId: $($user.ObjectId)”
        }
    }
} else {
    Write-Host “No duplicate proxy addresses found.”
}

[crayon–678056b30b1e6088415454 inline=“true” ]# Import the AzureAD module (or Microsoft.Graph if using that module)

Import–Module AzureAD # Or ‘Import-Module Microsoft.Graph’ if using the Microsoft Graph module

# Connect to Azure AD

Connect–AzureAD

# Get all users from Azure AD and their proxyAddresses

$users = Get–AzureADUser –All $true | Select–Object ObjectId, UserPrincipalName, ProxyAddresses

# Flatten the ProxyAddresses and identify duplicates

$allProxyAddresses = @()

foreach ($user in $users) {

if ($user.ProxyAddresses) {

$allProxyAddresses += $user.ProxyAddresses

}

# Group by ProxyAddress and filter duplicates

$duplicateProxyAddresses = $allProxyAddresses | Group–Object | Where–Object { $_.Count –gt 1 }

# Output duplicate proxy addresses

if ($duplicateProxyAddresses) {

$duplicateProxyAddresses | ForEach–Object {

$proxy = $_.Name

$occurrences = $_.Count

$duplicateUsers = $users | Where–Object { $_.ProxyAddresses –contains $proxy }

Write–Host “Duplicate ProxyAddress: $proxy occurs $occurrences times”

foreach ($user in $duplicateUsers) {

Write–Host “`tUser: $($user.UserPrincipalName) – ObjectId: $($user.ObjectId)”

}

} else {

Write–Host “No duplicate proxy addresses found.”

}

[/crayon]

epic

test Exchange Administrator Tecism

https://www.hiepic.com

theelau@gmail.com

415-000-0000

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