diff --git src/bp-core/admin/bp-core-admin-schema.php src/bp-core/admin/bp-core-admin-schema.php
index 87ec012..6201bf1 100644
--- src/bp-core/admin/bp-core-admin-schema.php
+++ src/bp-core/admin/bp-core-admin-schema.php
@@ -533,6 +533,14 @@ function bp_core_upgrade_signups() {
  * @since 2.5.0
  */
 function bp_core_install_emails() {
+	$needs_reset = false;
+
+	if ( is_multisite() && ! bp_is_root_blog() ) {
+		$needs_reset = true;
+
+		switch_to_blog( bp_get_root_blog_id() );
+	}
+
 	$defaults = array(
 		'post_status' => 'publish',
 		'post_type'   => bp_get_email_post_type(),
@@ -703,6 +711,10 @@ function bp_core_install_emails() {
 		}
 	}
 
+	if ( true === $needs_reset ) {
+		restore_current_blog();
+	}
+
 	/**
 	 * Fires after BuddyPress adds the posts for its emails.
 	 *