Fires when a user is removed from a blog on a multisite installation
jetpack_removed_user_from_blog
jetpack_removed_user_from_blog-
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action jetpack_user_editedFires when a user is edited on a site
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action jetpack_deleted_userFires when a user is deleted on a site
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filter jetpack_just_in_time_msg_cacheFilter to turn off jitm caching
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filter jetpack_just_in_time_msgsFilter to turn off all just in time messages
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filter jetpack_sync_site_urlAllows overriding of the site_url value that is synced back to WordPress.com.
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filter jetpack_sync_home_urlAllows overriding of the home_url value that is synced back to WordPress.com.
Jetpack Developer Resources 