Public/Exchange/Mailbox/Get/Get-ExMailboxFromCustomAttribute.ps1
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.SYNOPSIS Get mailboxes based on a custom attribute and compare specified attributes. .DESCRIPTION This function retrieves mailboxes based on a custom attribute and compares specified attributes. It returns a list of mailboxes along with their primary SMTP address, the custom attribute value, and whether the specified attributes match. It's more or less a Get-Mailbox with specific filter .PARAMETER Attribute The custom attribute to retrieve from the mailboxes. .PARAMETER CheckAttributes Optional. An array of two attributes to compare. If specified, the function checks if the values of these attributes match. Can be useful to compare two attributes for examples .EXAMPLE Get-ExMailboxFromAttribute -Attribute "CustomAttribute" -CheckAttributes @("Attribute1", "Attribute2") This example retrieves mailboxes with the custom attribute "CustomAttribute" and compares the values of "Attribute1" and "Attribute2". .EXAMPLE Get-ExMailboxFromAttribute -Attribute "CustomAttribute" This example retrieves mailboxes with the custom attribute "CustomAttribute" without comparing any attributes. .NOTES You can also use `Get-AttributeMatching` to compare two attributes directly in AD/Exchange/Entra ID #> function Get-ExMailboxFromAttribute { param ( [Parameter(Mandatory)] [string]$Attribute, [Parameter(Mandatory = $false)] [string[]]$CheckAttributes ) [System.Collections.Generic.List[PSCustomObject]] $mailboxesFound = @() # Attribute allows to get PrimarySMTPAddress and this specific attribute (for example forwardingSMTPAddress) and compare try { $allmbx = Get-EXOMailbox -ResultSize unlimited -Properties $Attribute -ErrorAction Stop | Where-Object { $_.$Attribute -ne $null } } catch { Write-Warning $_.Exception.Message return } $allmbx | ForEach-Object { $object = [PSCustomObject][ordered]@{ Name = $_.Name PrimarySmtpAddress = $_.PrimarySmtpAddress $Attribute = $_.$Attribute } if ($CheckAttributes -and $CheckAttributes.Count -eq 2) { $firstAttribute = $_.($CheckAttributes[0]) $secondAttribute = $_.($CheckAttributes[1]) $attributesMatch = $firstAttribute -eq $secondAttribute } $object | Add-Member -MemberType NoteProperty -Name "Match" -Value $attributesMatch $mailboxesFound.Add($object) } return $mailboxesFound } |