As you know, you can invite external users (known as guest) to your organization, leading to the creation of a guest account in your Azure AD.
You also know that reviewing such external access is always a complicated tasks.
To assist in this process, Microsoft has introduced some time ago already a feature called Azure AD Identity Governance allowing you to automate external access management.
Well, you can now automate actions when processing external access review. These actions are either:
The configuration options are available when using Identity Governance and Access packages (which requires the use of an Azure AD P2 or EMS E5 license [either paid or trial].
When you create a new access review, you will be able to define the actions under the Upon completion settings section