diff --git a/addons/sale_expense/__manifest__.py b/addons/sale_expense/__manifest__.py
index 7126a91a46c..7b6f43e2c37 100644
--- a/addons/sale_expense/__manifest__.py
+++ b/addons/sale_expense/__manifest__.py
@@ -16,6 +16,7 @@ This module allow to reinvoice employee expense, by setting the SO directly on t
     'depends': ['sale_management', 'hr_expense'],
     'data': [
         'data/digest_data.xml',
+        'views/assets.xml',
         'views/product_view.xml',
         'views/hr_expense_views.xml',
         'views/sale_order_views.xml',
diff --git a/addons/sale_expense/static/src/js/sale_order_many2one.js b/addons/sale_expense/static/src/js/sale_order_many2one.js
new file mode 100644
index 00000000000..9d63d1ea800
--- /dev/null
+++ b/addons/sale_expense/static/src/js/sale_order_many2one.js
@@ -0,0 +1,21 @@
+odoo.define('sale_expense.sale_order_many2one', function (require) {
+"use strict";
+
+var FieldMany2One = require('web.relational_fields').FieldMany2One;
+var FieldRegistry = require('web.field_registry');
+
+
+var OrderField = FieldMany2One.extend({
+    /**
+     * hide the search more option from the dropdown menu
+     * @override
+     * @private
+     * @returns {Object}
+     */
+    _manageSearchMore: function (values) {
+        return values;
+    }
+});
+FieldRegistry.add('sale_order_many2one', OrderField);
+return OrderField;
+});
diff --git a/addons/sale_expense/static/tests/sale_order_many2one_tests.js b/addons/sale_expense/static/tests/sale_order_many2one_tests.js
new file mode 100644
index 00000000000..62a8bb735c2
--- /dev/null
+++ b/addons/sale_expense/static/tests/sale_order_many2one_tests.js
@@ -0,0 +1,79 @@
+odoo.define('sale_expense.field_many_to_one_tests', function (require) {
+"use strict";
+
+var FormView = require('web.FormView');
+var testUtils = require('web.test_utils');
+
+var createView = testUtils.createView;
+
+
+QUnit.module('sale_expense', {
+    beforeEach: function () {
+        this.data = {
+            'hr.expense': {
+                fields: {
+                    name: { string: "Description", type: "char" },
+                    sale_order_id: { string: "Reinvoice Customer", type: 'many2one', relation: 'sale.order' },
+                },
+                records: []
+            },
+            'sale.order': {
+                fields: {
+                    name: { string: "Name", type: "char" },
+                },
+                records: [{
+                    id: 1,
+                    name: "SO1",
+                }, {
+                    id: 2,
+                    name: "SO2",
+                }, {
+                    id: 3,
+                    name: "SO3"
+                }, {
+                    id: 4,
+                    name: "SO4"
+                }, {
+                    id: 5,
+                    name: "SO5"
+                }, {
+                    id: 6,
+                    name: "SO6"
+                }, {
+                    id: 7,
+                    name: "SO7"
+                }, {
+                    id: 8,
+                    name: "SO8"
+                }, {
+                    id: 9,
+                    name: "SO9"
+                }]
+            },
+        };
+    },
+}, function () {
+    QUnit.test('sale order many2one without search more option', async function (assert) {
+        assert.expect(3);
+        var form = await createView({
+            View: FormView,
+            model: 'hr.expense',
+            data: this.data,
+            arch:
+                '<form string="Expense">' +
+                    '<sheet>' +
+                        '<group>' +
+                            '<field name="sale_order_id" widget="sale_order_many2one"/>' +
+                        '</group>' +
+                    '</sheet>' +
+                '</form>'
+        });
+        var $dropdown = form.$('.o_field_many2one input').autocomplete('widget');
+        await testUtils.fields.many2one.clickOpenDropdown('sale_order_id');
+        assert.containsN($dropdown, 'li:not(.o_m2o_dropdown_option)', 8, 'autocomplete should contains 8 suggestions');
+        assert.containsN($dropdown, 'li.o_m2o_dropdown_option', 1, 'autocomplete should contain only one option');
+        assert.containsNone($dropdown, 'li.o_m2o_dropdown_option:contains("Search More...")', "Should not display the 'Search More... option'");
+        form.destroy();
+    });
+});
+});
diff --git a/addons/sale_expense/views/assets.xml b/addons/sale_expense/views/assets.xml
new file mode 100644
index 00000000000..3b7f317b252
--- /dev/null
+++ b/addons/sale_expense/views/assets.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <template id="assets_backend" inherit_id="web.assets_backend">
+        <xpath expr="." position="inside">
+            <script type="text/javascript" src="/sale_expense/static/src/js/sale_order_many2one.js"/>
+        </xpath>
+    </template>
+
+    <template id="qunit_suite" inherit_id="web.qunit_suite">
+        <xpath expr="//script[last()]" position="after">
+            <script type="text/javascript" src="/sale_expense/static/tests/sale_order_many2one_tests.js"/>
+        </xpath>
+    </template>
+</odoo>
diff --git a/addons/sale_expense/views/hr_expense_views.xml b/addons/sale_expense/views/hr_expense_views.xml
index 5cbe6754283..11bee076710 100644
--- a/addons/sale_expense/views/hr_expense_views.xml
+++ b/addons/sale_expense/views/hr_expense_views.xml
@@ -7,7 +7,7 @@
         <field name="priority">30</field>
         <field name="arch" type="xml">
             <xpath expr="//field[@name='analytic_account_id']" position="before">
-                <field name="sale_order_id" attrs="{'invisible': [('can_be_reinvoiced', '=', False)]}" options="{'no_create_edit': True, 'no_create': True, 'no_open': True}" context="{'sale_show_partner_name': True, 'sale_expense_all_order': True}"/>
+                <field name="sale_order_id" attrs="{'invisible': [('can_be_reinvoiced', '=', False)]}" options="{'no_create_edit': True, 'no_create': True, 'no_open': True}" context="{'sale_show_partner_name': True, 'sale_expense_all_order': True}" widget="sale_order_many2one"/>
                 <field name="can_be_reinvoiced" invisible="1"/>
             </xpath>
         </field>
@@ -19,6 +19,7 @@
         <field name="arch" type="xml">
             <xpath expr="//field[@name='sale_order_id']" position="attributes">
                 <attribute name="attrs">{'invisible':[['can_be_reinvoiced','=',False]],'readonly':[['state','in',['done']]]}</attribute>
+                <attribute name="widget">many2one</attribute>
             </xpath>
         </field>
         <field name="groups_id" eval="[(6, 0, [ref('account.group_account_manager')])]"/>
@@ -30,6 +31,7 @@
         <field name="arch" type="xml">
             <xpath expr="//field[@name='sale_order_id']" position="attributes">
                 <attribute name="options">{'no_create_edit': True, 'no_create': True}</attribute>
+                <attribute name="widget">many2one</attribute>
             </xpath>
         </field>
         <field name="groups_id" eval="[(6, 0, [ref('sales_team.group_sale_salesman')])]"/>
diff --git a/addons/web/static/src/js/fields/relational_fields.js b/addons/web/static/src/js/fields/relational_fields.js
index 93863c2f619..f4337d0c8f9 100644
--- a/addons/web/static/src/js/fields/relational_fields.js
+++ b/addons/web/static/src/js/fields/relational_fields.js
@@ -401,6 +401,52 @@ var FieldMany2One = AbstractField.extend({
             }
         };
     },
+    /**
+     * @private
+     * @param {Object} values
+     * @param {string} search_val
+     * @param {Object} domain
+     * @param {Object} context
+     * @returns {Object}
+     */
+    _manageSearchMore: function (values, search_val, domain, context) {
+        var self = this;
+        values = values.slice(0, this.limit);
+        values.push({
+            label: _t("Search More..."),
+            action: function () {
+                var prom;
+                if (search_val !== '') {
+                    prom = self._rpc({
+                        model: self.field.relation,
+                        method: 'name_search',
+                        kwargs: {
+                            name: search_val,
+                            args: domain,
+                            operator: "ilike",
+                            limit: self.SEARCH_MORE_LIMIT,
+                            context: context,
+                        },
+                    });
+                }
+                Promise.resolve(prom).then(function (results) {
+                    var dynamicFilters;
+                    if (results) {
+                        var ids = _.map(results, function (x) {
+                            return x[0];
+                        });
+                        dynamicFilters = [{
+                            description: _.str.sprintf(_t('Quick search: %s'), search_val),
+                            domain: [['id', 'in', ids]],
+                        }];
+                    }
+                    self._searchCreatePopup("search", false, {}, dynamicFilters);
+                });
+            },
+            classname: 'o_m2o_dropdown_option',
+        });
+        return values;
+    },
     /**
      * Listens to events 'field_changed' to keep track of the last event that
      * has been trigerred. This allows to detect that all changes have been
@@ -552,40 +598,7 @@ var FieldMany2One = AbstractField.extend({
 
                 // search more... if more results than limit
                 if (values.length > self.limit) {
-                    values = values.slice(0, self.limit);
-                    values.push({
-                        label: _t("Search More..."),
-                        action: function () {
-                            var prom;
-                            if (search_val !== '') {
-                                prom = self._rpc({
-                                    model: self.field.relation,
-                                    method: 'name_search',
-                                    kwargs: {
-                                        name: search_val,
-                                        args: domain,
-                                        operator: "ilike",
-                                        limit: self.SEARCH_MORE_LIMIT,
-                                        context: context,
-                                    },
-                                });
-                            }
-                            Promise.resolve(prom).then(function (results) {
-                                var dynamicFilters;
-                                if (results) {
-                                    var ids = _.map(results, function (x) {
-                                        return x[0];
-                                    });
-                                    dynamicFilters = [{
-                                        description: _.str.sprintf(_t('Quick search: %s'), search_val),
-                                        domain: [['id', 'in', ids]],
-                                    }];
-                                }
-                                self._searchCreatePopup("search", false, {}, dynamicFilters);
-                            });
-                        },
-                        classname: 'o_m2o_dropdown_option',
-                    });
+                    values = self._manageSearchMore(values, search_val, domain, context);
                 }
                 var create_enabled = self.can_create && !self.nodeOptions.no_create;
                 // quick create