diff --git a/addons/bus/controllers/main.py b/addons/bus/controllers/main.py
index 54bb005d5fc..5adfbb30a10 100644
--- a/addons/bus/controllers/main.py
+++ b/addons/bus/controllers/main.py
@@ -41,4 +41,4 @@ class BusController(Controller):
 
     @route('/longpolling/im_status', type="json", auth="user")
     def im_status(self, partner_ids):
-        return request.env['res.partner'].search_read([['id', 'in', partner_ids]], ['id', 'im_status'])
+        return request.env['res.partner'].browse(partner_ids).read(['im_status'])
diff --git a/addons/mail/models/res_partner.py b/addons/mail/models/res_partner.py
index af409c392f3..f139e483d58 100644
--- a/addons/mail/models/res_partner.py
+++ b/addons/mail/models/res_partner.py
@@ -69,6 +69,7 @@ class Partner(models.Model):
             "display_name": self.name_get()[0][1],
             "name": self.name,
             "active": self.active,
+            "im_status": self.im_status,
         }
 
     @api.model
diff --git a/addons/mail/static/src/models/messaging_initializer/messaging_initializer.js b/addons/mail/static/src/models/messaging_initializer/messaging_initializer.js
index 304faf79674..9fc0c052448 100644
--- a/addons/mail/static/src/models/messaging_initializer/messaging_initializer.js
+++ b/addons/mail/static/src/models/messaging_initializer/messaging_initializer.js
@@ -237,74 +237,36 @@ function factory(dependencies) {
         /**
          * @private
          * @param {Object} current_partner
-         * @param {boolean} current_partner.active
-         * @param {string} current_partner.display_name
-         * @param {integer} current_partner.id
-         * @param {string} current_partner.name
          * @param {integer} current_user_id
          * @param {integer[]} moderation_channel_ids
          * @param {Object} partner_root
-         * @param {boolean} partner_root.active
-         * @param {string} partner_root.display_name
-         * @param {integer} partner_root.id
-         * @param {string} partner_root.name
          * @param {Object} public_partner
-         * @param {boolean} public_partner.active
-         * @param {string} public_partner.display_name
-         * @param {integer} public_partner.id
-         * @param {string} public_partner.name
          */
         _initPartners({
-            current_partner: {
-                active: currentPartnerIsActive,
-                display_name: currentPartnerDisplayName,
-                id: currentPartnerId,
-                name: currentPartnerName,
-            },
+            current_partner,
             current_user_id: currentUserId,
             moderation_channel_ids = [],
-            partner_root: {
-                active: partnerRootIsActive,
-                display_name: partnerRootDisplayName,
-                id: partnerRootId,
-                name: partnerRootName,
-            },
-            public_partner: {
-                active: publicPartnerIsActive,
-                display_name: publicPartnerDisplayName,
-                id: publicPartnerId,
-                name: publicPartnerName,
-            },
+            partner_root,
+            public_partner,
         }) {
             this.messaging.update({
-                currentPartner: [['insert', {
-                    active: currentPartnerIsActive,
-                    display_name: currentPartnerDisplayName,
-                    id: currentPartnerId,
-                    moderatedChannels: [
-                        ['insert', moderation_channel_ids.map(id => {
-                            return {
-                                id,
-                                model: 'mail.channel',
-                            };
-                        })],
-                    ],
-                    name: currentPartnerName,
-                    user: [['insert', { id: currentUserId }]],
-                }]],
+                currentPartner: [['insert', Object.assign(
+                    this.env.models['mail.partner'].convertData(current_partner),
+                    {
+                        moderatedChannels: [
+                            ['insert', moderation_channel_ids.map(id => {
+                                return {
+                                    id,
+                                    model: 'mail.channel',
+                                };
+                            })],
+                        ],
+                        user: [['insert', { id: currentUserId }]],
+                    }
+                )]],
                 currentUser: [['insert', { id: currentUserId }]],
-                partnerRoot: [['insert', {
-                    active: partnerRootIsActive,
-                    display_name: partnerRootDisplayName,
-                    id: partnerRootId,
-                    name: partnerRootName,
-                }]],
-                publicPartner: [['insert', {
-                    active: publicPartnerIsActive,
-                    display_name: publicPartnerDisplayName,
-                    id: publicPartnerId,
-                    name: publicPartnerName,
-                }]],
+                partnerRoot: [['insert', this.env.models['mail.partner'].convertData(partner_root)]],
+                publicPartner: [['insert', this.env.models['mail.partner'].convertData(public_partner)]],
             });
         }
 
diff --git a/addons/mail/static/src/models/partner/partner.js b/addons/mail/static/src/models/partner/partner.js
index e0aba1322f2..70bcad40376 100644
--- a/addons/mail/static/src/models/partner/partner.js
+++ b/addons/mail/static/src/models/partner/partner.js
@@ -22,6 +22,9 @@ function factory(dependencies) {
          */
         static convertData(data) {
             const data2 = {};
+            if ('active' in data) {
+                data2.active = data.active;
+            }
             if ('country' in data) {
                 if (!data.country) {
                     data2.country = [['unlink-all']];
@@ -213,35 +216,22 @@ function factory(dependencies) {
          * @private
          */
         static async _fetchImStatus() {
-            let toFetchPartnersLocalIds = [];
-            let partnerIdToLocalId = {};
-            const toFetchPartners = this.all(partner => partner.im_status !== null);
-            for (const partner of toFetchPartners) {
-                toFetchPartnersLocalIds.push(partner.localId);
-                partnerIdToLocalId[partner.id] = partner.localId;
+            const partnerIds = [];
+            for (const partner of this.all()) {
+                if (partner.im_status !== 'im_partner') {
+                    partnerIds.push(partner.id);
+                }
             }
-            if (!toFetchPartnersLocalIds.length) {
+            if (partnerIds.length === 0) {
                 return;
             }
             const dataList = await this.env.services.rpc({
                 route: '/longpolling/im_status',
                 params: {
-                    partner_ids: toFetchPartnersLocalIds.map(partnerLocalId =>
-                        this.get(partnerLocalId).id
-                    ),
+                    partner_ids: partnerIds,
                 },
             }, { shadow: true });
-            for (const { id, im_status } of dataList) {
-                this.insert({ id, im_status });
-                delete partnerIdToLocalId[id];
-            }
-            // partners with no im_status => set null
-            for (const noImStatusPartnerLocalId of Object.values(partnerIdToLocalId)) {
-                const partner = this.get(noImStatusPartnerLocalId);
-                if (partner) {
-                    partner.update({ im_status: null });
-                }
-            }
+            this.insert(dataList);
         }
 
         /**