If you haven't already, assign the Approver role to at least one user so that
user can approve valid requests to grant the role. See Request and assign the Approver role for details.
Open the role page.
Under the Administration menu on the left, click
Roles.
In the Search section, for Display Name:
From the list, select
Equals.
In the field, type the role name, without the
ShortOrgId.
Click Search.
In the Search Results, click the link in the Display
Name column to open the role page.
In the row of controls at the top of the page, click Set Approval
Options.
In the dialog box, select Activate Approval.
If you want requesting users to receive a notification once the access request
is approved or rejected, select Notify the user on request
status.
Click Submit.
The message Approval activated for the role appears at the
bottom if the operation succeeded.