Learn more about how you can Display a Unique Membership Number on various locations of your Paid Memberships Pro Membership site….
Redirect the s2member IPN URL to the PMPro IPN URL
If you’re migrating from s2member to Paid Memberships Pro, here’s one additional step needed to ensure PayPal IPN data is sent and updated within PMPro.
Customize and add this code to your theme’s functions.php file or a helper PMPro Customizations plugin (our recommended method).
The code would be very similar for other membership plugins. If you need help crafting this IPN redirect for another plugin migration, post to the member forums.