diff --git a/drivers/place/attendee_scanner.cr b/drivers/place/attendee_scanner.cr
new file mode 100644
index 00000000000..221053db06e
--- /dev/null
+++ b/drivers/place/attendee_scanner.cr
@@ -0,0 +1,98 @@
+require "placeos-driver"
+require "json"
+
+class Place::AttendeeScanner < PlaceOS::Driver
+  descriptive_name "PlaceOS Room Events"
+  generic_name :AttendeeScanner
+
+  accessor staff_api : StaffAPI_1
+
+  default_settings({
+    internal_domains: [] of String,
+  })
+
+  getter systems : Hash(String, Array(String)) { get_systems_list.not_nil! }
+  getter internal_domains : Array(String) = [] of String
+
+  def on_update
+    @internal_domains = setting(Array(String), :internal_domains)
+  end
+
+  # Grabs the list of systems in the building
+  def get_systems_list
+    building_id = system[:Location].building_id.get
+    system["StaffAPI"].systems_in_building(building_id).get.as_h.transform_values(&.as_a.map(&.as_s))
+  rescue error
+    logger.warn(exception: error) { "unable to obtain list of systems in the building" }
+    nil
+  end
+
+  # Lists external guests based on email domains
+  def list_external_guests
+    values = [] of Hash(String, JSON::Any)
+
+    systems.each do |level_id, system_ids|
+      system_ids.each do |system_id|
+        period_start = Time.local.to_unix
+        period_end = Time.local.to_unix + 86400
+
+        events = staff_api.query_events(period_start, period_end, systems: [system_id]).get
+
+        events.as_a.each do |event|
+          domain = event.as_h.["host"].as_s.split("@").last
+
+          unless internal_domains.includes?(domain)
+            event_id = event.as_h.["id"].as_s
+            ical_uid = event.as_h.["ical_uid"].as_s
+
+            bookings = staff_api.query_bookings(event_id: event_id, ical_uid: ical_uid).get
+
+            attendee_emails = event["attendees"].as_a.map do |attendee|
+              attendee.as_h.["email"].as_s
+            end
+
+            bookings.as_a.each do |booking|
+              booking = booking.as_h
+
+              booking.["attendees"].as_a.each do |attendee|
+                attendee_email = attendee.as_h.["email"].as_s
+
+                unless attendee_emails.includes?(attendee_email)
+                  staff_api.create_booking(
+                    booking_type: "visitor",
+                    asset_id: attendee_email,
+                    user_id: attendee_email,
+                    user_email: attendee_email,
+                    user_name: booking["user_name"].as_s,
+                    zones: booking["zones"].as_a?,
+                    booking_start: booking["booking_start"].as_s?,
+                    booking_end: booking["booking_end"].as_s?,
+                    checked_in: booking["checked_in"].as_bool?,
+                    approved: booking["approved"].as_bool?,
+                    title: booking["title"].as_s?,
+                    description: booking["description"].as_s?,
+                    time_zone: booking["time_zone"].as_s?,
+                    extension_data: booking["extension_data"]?,
+                    utm_source: nil,
+                    limit_override: nil,
+                    event_id: event_id,
+                    ical_uid: ical_uid,
+                    attendees: nil
+                  ).get
+
+                  values.push({
+                    "event_id" => event.as_h.["id"],
+                    "ical_uid" => event.as_h.["ical_uid"],
+                    "booking"  => JSON::Any.new(booking),
+                  })
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+
+    values
+  end
+end
diff --git a/drivers/place/staff_api.cr b/drivers/place/staff_api.cr
index e2acb572e6a..387b5cafb55 100644
--- a/drivers/place/staff_api.cr
+++ b/drivers/place/staff_api.cr
@@ -547,6 +547,8 @@ class Place::StaffAPI < PlaceOS::Driver
     extension_data : JSON::Any? = nil,
     utm_source : String? = nil,
     limit_override : Int64? = nil,
+    event_id : String? = nil,
+    ical_uid : String? = nil,
     attendees : Array(PlaceCalendar::Event::Attendee)? = nil
   )
     now = time_zone ? Time.local(Time::Location.load(time_zone)) : Time.local
@@ -560,6 +562,8 @@ class Place::StaffAPI < PlaceOS::Driver
     params = URI::Params.build do |form|
       form.add "utm_source", utm_source.to_s unless utm_source.nil?
       form.add "limit_override", limit_override.to_s unless limit_override.nil?
+      form.add "event_id", event_id.to_s unless event_id.nil?
+      form.add "ical_uid", ical_uid.to_s unless ical_uid.nil?
     end
 
     response = post("/api/staff/v1/bookings?#{params}", headers: authentication, body: {
@@ -728,6 +732,8 @@ class Place::StaffAPI < PlaceOS::Driver
     user : String? = nil,
     email : String? = nil,
     state : String? = nil,
+    event_id : String? = nil,
+    ical_uid : String? = nil,
     created_before : Int64? = nil,
     created_after : Int64? = nil,
     approved : Bool? = nil,
@@ -754,6 +760,8 @@ class Place::StaffAPI < PlaceOS::Driver
       form.add "approved", approved.to_s unless approved.nil?
       form.add "rejected", rejected.to_s unless rejected.nil?
       form.add "checked_in", checked_in.to_s unless checked_in.nil?
+      form.add "event_id", event_id.to_s if event_id.presence
+      form.add "ical_uid", ical_uid.to_s if ical_uid.presence
       form.add "include_checked_out", include_checked_out.to_s unless include_checked_out.nil?
 
       if extension_data