Merge pull request #528 from 10up/docs/366-push-to-new-cpts

Docs: Unable to PUSH new CPTs

README.md

@@ -94,6 +94,8 @@ __Parent Posts__ - Distributor does not "bring along" parent (or child posts). I
 
 __Custom Post Type Support__ - Internal Connections (multisite) support multiple post types. In order for distribution to work with External Connections that have custom post type content, that post type needs to be registered with the argument `show_in_rest => true` on the external site.
 
+__Unable to Push to New Custom Post Types__ - If new Custom Post Types are created after establishing an External Connection, you will only be able to `Pull` those from an External Connection. To ensure you are able to `Push` new Custom Post Types to an External Connection, you will need to update the External Connection by editing it and then clicking the `Update connection` button.
+
 __Backwards Compatibility__ - While we strive to be mindful of backwards compatibility much the same way WordPress itself is, we do not currently guarantee continued interoperability between different versions of Distributor. We assume the current userbase for this plugin has a high degree of control over any site that has been set up as an external connection and urge you to keep Distributor up to date.
 
 __Distributing Post content__ - By default, post content is rendered before being copied.  This means that shortcodes are expanded before being distributed and remote posts will not have the shortcode, but rather the expanded HTML content.