PowerShell: Remove a portion of displayname-CodePudding

I need to remove a portion of the displayname of some guest users in Azure AD.

Displayname: Company - Firstname Lastname (Company - needs to be removed)

The guest accounts don't have 'Firstname' and 'Lastname' attribute filled in. I have a script running that can add something to a displayname:

#Guest CompanyNames
$Companies = @('Company1','Company2')

#Get guest users with UPN like: company.extension#EXT#@domain.onmicrosoft.com
Foreach ($Company in $Companies){
    $Users = Get-AzureADUser -All $true | Where-Object {($_.UserPrincipalName -like "*$Company.*") -and ($_.DisplayName -notlike "*($Company)")}

    foreach ($User in $Users){
        $DisplayName = $User.DisplayName   " "   "($Company)"
        Set-AzureADUser -ObjectId $User.ObjectId -Displayname $DisplayName
    }
    
}

I cannot find anything to tweak this kind of script to remove 'Company -' from a displayname. Hope someone can help me out, thanks!

CodePudding user response：

To do the opposite of your posted code, i.e. removing the company name that starts off the displayname, you might use this:

$Companies = 'Company1','Company2'
# join the company names with regex 'OR' ('|')
$regexCompanies = '^({0})\s*-\s*' -f (($Companies | ForEach-Object { [regex]::Escape($_) }) -join '|')

# find users that have a DisplayName starting with one of the company names
$Users = Get-AzureADUser -All $true | Where-Object {$_.DisplayName -match $regexCompanies}
foreach ($User in $Users) {
    # split the displayname in two parts, take the last part and trim it
    $DisplayName = ($User.DisplayName -split '\s*-\s*', 2)[-1].Trim()
    Set-AzureADUser -ObjectId $User.ObjectId -Displayname $DisplayName
}

^{BTW. Inside your foreach ($User in $Users) loop, you should be using $User, not $Users..}