diff --git a/CHANGELOG.md b/CHANGELOG.md
index fbcfb1b9..05c739e6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@ The file format of it is based on [Keep a Changelog](http://keepachangelog.com/e
 For public Changelog covering all changes done to Pipedrive’s API, webhooks and app extensions platforms, see [public Changelog](https://pipedrive.readme.io/docs/changelog) with discussion area in [Developers Community](https://devcommunity.pipedrive.com/c/documentation/changelog/19).
 
 ## [Unreleased]
+### Added
+- Notice informing the users of the upcoming Activity Invites feature deprecation:
+  - `POST` and `PUT` `/v1/activities` endpoints
 
 ## [23.1.0] - 2024-07-03
 ### Added
diff --git a/docs/ActivitiesApi.md b/docs/ActivitiesApi.md
index b4b1868b..87db84e0 100644
--- a/docs/ActivitiesApi.md
+++ b/docs/ActivitiesApi.md
@@ -20,7 +20,7 @@ Method | HTTP request | Description
 
 Add an activity
 
-Adds a new activity. Includes `more_activities_scheduled_in_context` property in response's `additional_data` which indicates whether there are more undone activities scheduled with the same deal, person or organization (depending on the supplied data). For more information, see the tutorial for <a href=\"https://pipedrive.readme.io/docs/adding-an-activity\" target=\"_blank\" rel=\"noopener noreferrer\">adding an activity</a>.
+Adds a new activity. Includes `more_activities_scheduled_in_context` property in response's `additional_data` which indicates whether there are more undone activities scheduled with the same deal, person or organization (depending on the supplied data). For more information, see the tutorial for <a href=\"https://pipedrive.readme.io/docs/adding-an-activity\" target=\"_blank\" rel=\"noopener noreferrer\">adding an activity</a>. <br /> <br /> ***Starting from 30.09.2024, activity attendees will receive updates only if the activity owner has an active calendar sync***
 
 ### Example
 
@@ -372,7 +372,7 @@ Name | Type | Description  | Notes
 
 Update an activity
 
-Updates an activity. Includes `more_activities_scheduled_in_context` property in response's `additional_data` which indicates whether there are more undone activities scheduled with the same deal, person or organization (depending on the supplied data).
+Updates an activity. Includes `more_activities_scheduled_in_context` property in response's `additional_data` which indicates whether there are more undone activities scheduled with the same deal, person or organization (depending on the supplied data). <br /> <br /> ***Starting from 30.09.2024, activity attendees will receive updates only if the activity owner has an active calendar sync***
 
 ### Example
 
diff --git a/src/api/ActivitiesApi.js b/src/api/ActivitiesApi.js
index abfdc8e0..e2338709 100644
--- a/src/api/ActivitiesApi.js
+++ b/src/api/ActivitiesApi.js
@@ -47,7 +47,7 @@ export default class ActivitiesApi {
 
     /**
      * Add an activity
-     * Adds a new activity. Includes `more_activities_scheduled_in_context` property in response's `additional_data` which indicates whether there are more undone activities scheduled with the same deal, person or organization (depending on the supplied data). For more information, see the tutorial for <a href=\"https://pipedrive.readme.io/docs/adding-an-activity\" target=\"_blank\" rel=\"noopener noreferrer\">adding an activity</a>.
+     * Adds a new activity. Includes `more_activities_scheduled_in_context` property in response's `additional_data` which indicates whether there are more undone activities scheduled with the same deal, person or organization (depending on the supplied data). For more information, see the tutorial for <a href=\"https://pipedrive.readme.io/docs/adding-an-activity\" target=\"_blank\" rel=\"noopener noreferrer\">adding an activity</a>. <br /> <br /> ***Starting from 30.09.2024, activity attendees will receive updates only if the activity owner has an active calendar sync***
      * @param {Object} opts Optional parameters
      * @param {module:model/ActivityPostObject} opts.activityPostObject 
      * @return {Promise} a {@link https://www.promisejs.org/|Promise}, with an object containing data of type {@link module:model/AddActivityResponse200} and HTTP response
@@ -95,7 +95,7 @@ export default class ActivitiesApi {
 
     /**
      * Add an activity
-     * Adds a new activity. Includes `more_activities_scheduled_in_context` property in response's `additional_data` which indicates whether there are more undone activities scheduled with the same deal, person or organization (depending on the supplied data). For more information, see the tutorial for <a href=\"https://pipedrive.readme.io/docs/adding-an-activity\" target=\"_blank\" rel=\"noopener noreferrer\">adding an activity</a>.
+     * Adds a new activity. Includes `more_activities_scheduled_in_context` property in response's `additional_data` which indicates whether there are more undone activities scheduled with the same deal, person or organization (depending on the supplied data). For more information, see the tutorial for <a href=\"https://pipedrive.readme.io/docs/adding-an-activity\" target=\"_blank\" rel=\"noopener noreferrer\">adding an activity</a>. <br /> <br /> ***Starting from 30.09.2024, activity attendees will receive updates only if the activity owner has an active calendar sync***
      * @param {Object} opts Optional parameters
      * @param {module:model/ActivityPostObject} opts.activityPostObject 
      * @return {Promise} a {@link https://www.promisejs.org/|Promise}, with data of type {@link module:model/AddActivityResponse200}
@@ -488,7 +488,7 @@ export default class ActivitiesApi {
 
     /**
      * Update an activity
-     * Updates an activity. Includes `more_activities_scheduled_in_context` property in response's `additional_data` which indicates whether there are more undone activities scheduled with the same deal, person or organization (depending on the supplied data).
+     * Updates an activity. Includes `more_activities_scheduled_in_context` property in response's `additional_data` which indicates whether there are more undone activities scheduled with the same deal, person or organization (depending on the supplied data). <br /> <br /> ***Starting from 30.09.2024, activity attendees will receive updates only if the activity owner has an active calendar sync***
      * @param {Number} id The ID of the activity
      * @param {Object} opts Optional parameters
      * @param {module:model/ActivityPutObject} opts.activityPutObject 
@@ -543,7 +543,7 @@ export default class ActivitiesApi {
 
     /**
      * Update an activity
-     * Updates an activity. Includes `more_activities_scheduled_in_context` property in response's `additional_data` which indicates whether there are more undone activities scheduled with the same deal, person or organization (depending on the supplied data).
+     * Updates an activity. Includes `more_activities_scheduled_in_context` property in response's `additional_data` which indicates whether there are more undone activities scheduled with the same deal, person or organization (depending on the supplied data). <br /> <br /> ***Starting from 30.09.2024, activity attendees will receive updates only if the activity owner has an active calendar sync***
      * @param {Number} id The ID of the activity
      * @param {Object} opts Optional parameters
      * @param {module:model/ActivityPutObject} opts.activityPutObject