PowerShell is the tool you need to list all inbox rules of all users in your environment. In this blog post I will show how to connect to Exchange Online to afterwards retrieve all outlook inbox rules created by the user. Let’s dive in.

Connect to Microsoft 365 / Exchange Online

First we need to connect to our tenant. Run the commands below to open a PowerShell session to your Microsoft cloud.

 Install-Module -Name ExchangeOnlineManagement -Force -AllowClobber 
Connect-ExchangeOnline -UserPrincipalName user@domain.com -ShowProgress $true 

Fine. Let’s move on.

List Inbox Rules from all users

We are now ready to get a list of all rules created by the user. Run the command below to get them all.

 Get-ExoMailbox -ResultSize Unlimited | 
Select-Object -ExpandProperty UserPrincipalName | 
Foreach-Object {Get-InboxRule -Mailbox $_ | 
Select-Object -Property MailboxOwnerID,Name,Enabled,From,Description,RedirectTo,ForwardTo}

Here they are (Rules in German):

See you next time with PowerShell!