Using PowerShell to add the proxyAddresses attribute with specific format? - powershell

Question

I need to add new email aliases to the users in the specific OU, with a specific format like:
user Alias / sAMAccountName = First Lastname
newAlias = FLastname#NewBrandX.com
User with Apostrophe
user Alias / sAMAccountName = John O'Dea
newAlias = JOdea#NewBrandX.com
User with either First or Lastname with spaces
user Alias / sAMAccountName = Peter Van Denberg
newAlias = PVanDenberg#NewBrandX.com
However, my script skill is quite limited, so I wonder if anyone can assist in the script modification below:
$newproxy = "#NewBrandX.com"
$userou = 'OU=Users,OU=Seattle,DC=usa,DC=contoso,DC=com'
$paramGetADUser = #{
Filter = 'Enable -eq $true'
SearchBase = $userou
Properties = 'SamAccountName', 'ProxyAddresses', 'givenName', 'Surname'
}
$users = Get-ADUser #paramGetADUser
Foreach ($user in $users)
{
$FirstName = $user.givenName.ToLower() -replace '\s', ''
$LastName = $user.surname.ToLower() -replace '\s', '' -replace "'", ''
Set-ADUser -Identity $user.samaccountname -Add #{ proxyAddresses = "smtp:" + $FirstName + $LastName + $newproxy }
}

Answer 1

It looks to me like you want a create a new proxy address in format
First character of GivenName
Surname without apostrophes or spaces
followed by "#NewBrandX.com".
Your code however takes the full GivenName.
To add to the ProxyAddresses array, you need to replace the entire [string[]] array
$newproxy = "#NewBrandX.com"
$userou = 'OU=Users,OU=Seattle,DC=usa,DC=contoso,DC=com'
$paramGetADUser = #{
Filter = 'Enable -eq $true'
SearchBase = $userou
Properties = 'ProxyAddresses' # SamAccountName, GivenName and Surname are returned by default
}
$users = Get-ADUser #paramGetADUser
foreach ($user in $users) {
$newAddress = ("smtp:{0}{1}$newproxy" -f $user.GivenName.Trim()[0], ($user.Surname -replace "[\s']+").ToLower())
$proxies = #($user.ProxyAddresses)
# test if this user already has this address in its ProxyAddresses attribute
if ($proxies -contains $newAddress) {
Write-Host "User $($user.Name) already has '$newAddress' as proxy address"
}
else {
Write-Host "Setting new proxy address '$newAddress' to user $($user.Name)"
$proxies += $newAddress
# proxyAddresses needs a **strongly typed** string array, that is why we cast the $proxies array with [string[]]
$user | Set-ADUser -Replace #{ proxyAddresses = [string[]]$proxies }
}
}