Get Mailbox Rules Using PowerShell

Ever found yourself tangled in the web of Exchange Online mailbox rules? Yeah, me too. It’s like trying to find a needle in a haystack, especially if you’re managing multiple mailboxes. Thankfully, I stumbled upon a nifty PowerShell script that makes this task a breeze. Let’s Get Mailbox Rules Using PowerShell.

Let’s Talk About Our Script

Before we jump into the script, let’s understand what it does. The PowerShell script Get-RASMailboxRules helps you retrieve mailbox rules for specific email addresses in Exchange Online. Whether you’re an IT admin juggling a dozen tasks or just someone who likes things neat and tidy, this script can save you a ton of time.

Breaking Down the Script

Here’s the full script for reference:

function Get-RASMailboxRules {
    [cmdletbinding()]
    param (
        [Parameter(
            ValueFromPipeline = $True,
            ValueFromPipelineByPropertyName = $True,
            HelpMessage = "Email Addresses",
            Mandatory = $true)][Alias('Mailbox','EmailAddress')][String[]]$Mailboxes
    )
    begin {
        # Checks if Exchange Online is connected
        if ($null -eq (Get-ConnectionInformation)) {Connect-ExchangeOnline}

        # Pulls all mailboxes from the $Mailboxes parameter and checks if they exist
        $Boxes = @()
        foreach ($box in $mailboxes) {
            Try {
                $Boxes += Get-Mailbox $box
            } catch {
                Write-Error "Error getting mailbox"
            }
        }
    }
    process {
        foreach ($mailbox in $Boxes) {
            $Rules = Get-InboxRule -Mailbox $mailbox.Name

            foreach ($Rule in $Rules) {
                $ruleDescription = $Rule.Description -join "`n"
                $Description = (($ruleDescription -split 'If the message:')[1] -split 'Take the following actions:')
                $ifMessage = ($Description[0].Trim() -replace "`t", "") -replace "\s*`n", ""
                $actions = ($Description[1].Trim() -replace "`t", "") -replace "\s*`n", ""

                [PSCustomObject]@{
                    MailboxName = $Mailbox.Name
                    Mailbox = $Mailbox.UserPrincipalName
                    RuleName = $Rule.Name
                    Enabled = $Rule.Enabled
                    ID = $Rule.RuleIdentity
                    IfMessage = $ifMessage
                    Actions = $actions
                }
            }
        }
    }
    end {
        Disconnect-ExchangeOnline -Confirm:$false
    }
}

What’s Happening Here?

Let’s break it down:

Parameters and Initialization:
- The script takes email addresses as input through the $Mailboxes parameter.
- It checks if Exchange Online is connected. If not, it connects using Connect-ExchangeOnline.
Fetching Mailboxes:
- It loops through the provided mailboxes and tries to fetch their details using Get-Mailbox.
- Any errors encountered during this process are caught and reported.
Processing Mailbox Rules:
- For each mailbox, it retrieves the inbox rules using Get-InboxRule.
- It parses the rules to extract the conditions (IfMessage) and actions (Actions).
Output:
- It creates a custom PowerShell object for each rule, which includes details like mailbox name, rule name, enabled status, and more.
- Finally, it disconnects from Exchange Online to clean up.

Key Points to Remember

Mandatory Parameter: The script requires at least one email address to be provided.
Error Handling: It gracefully handles errors when fetching mailbox details.
Custom Output: The output is a clean, readable list of mailbox rules with all the necessary details.

Wrapping up “Get Mailbox Rules using PowerShell”

And there you have it! A super handy PowerShell script to get mailbox rules using PowerShell in order. It’s efficient, straightforward, and takes the hassle out of managing mailbox rules. So next time you’re knee-deep in inbox rules, you know which script to pull out.

Happy scripting, folks! If you run into any issues or have questions, drop them in the comments below. Let’s keep the conversation going!