Retrieves mailbox rules for a specified customer tenant ID.
The Get-CIPPMailboxRules function retrieves mailbox rules for a specified customer tenant ID by making a REST API call to the "/api/listmailboxrules" endpoint.
PS > Get-CIPPMailboxRules -CustomerTenantID "contoso.onmicrosoft.com"
This example retrieves mailbox rules for the customer tenant with the ID "contoso.onmicrosoft.com".