diff --git a/pms/models/pms_folio.py b/pms/models/pms_folio.py
index e7b57a003..3f4e816fc 100644
--- a/pms/models/pms_folio.py
+++ b/pms/models/pms_folio.py
@@ -38,6 +38,9 @@ class PmsFolio(models.Model):
     external_reference = fields.Char(
         string="External Reference",
         help="Reference of this folio in an external system",
+        compute="_compute_external_reference",
+        readonly=False,
+        store=True,
     )
     pms_property_id = fields.Many2one(
         string="Property",
@@ -711,6 +714,20 @@ class PmsFolio(models.Model):
         ]
         return res
 
+    @api.depends("reservation_ids", "reservation_ids.external_reference")
+    def _compute_external_reference(self):
+        for folio in self:
+            folio.external_reference = folio._get_folio_external_reference()
+
+    def _get_folio_external_reference(self):
+        self.ensure_one()
+        references = list(set(self.reservation_ids.mapped("external_reference")))
+        references = list(filter(bool, references))
+        if references:
+            return ",".join(references)
+        else:
+            return False
+
     @api.depends("partner_id", "invoice_status", "last_checkout", "partner_invoice_ids")
     def _compute_autoinvoice_date(self):
         self.autoinvoice_date = False
diff --git a/pms/models/pms_reservation.py b/pms/models/pms_reservation.py
index 82db73d6b..13d92c2ba 100644
--- a/pms/models/pms_reservation.py
+++ b/pms/models/pms_reservation.py
@@ -26,6 +26,13 @@ class PmsReservation(models.Model):
         help="Reservation Code Identification",
         readonly=True,
     )
+    external_reference = fields.Char(
+        string="External Reference",
+        help="Reference of this folio in an external system",
+        compute="_compute_external_reference",
+        store=True,
+        readonly=False,
+    )
     folio_sequence = fields.Integer(
         string="Folio Sequence",
         help="Techinal field to get reservation name",
@@ -668,6 +675,22 @@ class PmsReservation(models.Model):
         string="Language", comodel_name="res.lang", compute="_compute_lang"
     )
 
+    @api.depends("folio_id", "folio_id.external_reference")
+    def _compute_external_reference(self):
+        for reservation in self:
+            if not reservation.external_reference:
+                reservation.external_reference = (
+                    reservation._get_reservation_external_reference()
+                )
+
+    def _get_reservation_external_reference(self):
+        self.ensure_one()
+        folio = self.folio_id
+        if folio and folio.external_reference:
+            return folio.external_reference
+        else:
+            return False
+
     def _compute_date_order(self):
         for record in self:
             record.date_order = datetime.datetime.today()
diff --git a/pms/views/pms_reservation_views.xml b/pms/views/pms_reservation_views.xml
index fd93fbdd6..17188ed8b 100644
--- a/pms/views/pms_reservation_views.xml
+++ b/pms/views/pms_reservation_views.xml
@@ -436,6 +436,10 @@
                                 name="agency_id"
                                 attrs="{'invisible': [('reservation_type', '!=', 'normal')]}"
                             />
+                            <field
+                                name="external_reference"
+                                attrs="{'invisible': [('agency_id', '=', False)]}"
+                            />
                             <field
                                 name="channel_type_id"
                                 attrs="{'readonly':[('agency_id','!=', False)], 'invisible': [('reservation_type', '!=', 'normal')]}"