diff --git a/api/js/jsapi/egw_app.js b/api/js/jsapi/egw_app.js
index 75c6111e86..fea13684b8 100644
--- a/api/js/jsapi/egw_app.js
+++ b/api/js/jsapi/egw_app.js
@@ -11,6 +11,7 @@
  * @author Nathan Gray <ng@groupware.org>
  */
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.EgwApp = void 0;
 require("jquery");
 require("jqueryui");
 require("../jsapi/egw_global");
@@ -190,6 +191,42 @@ var EgwApp = /** @class */ (function () {
         var id_app = _senders[0].id.split('::');
         egw.open(id_app[1], this.appname);
     };
+    /**
+     * Open a CRM view for a contact
+     *
+     * @param _action
+     * @param _senders
+     * @param _contact_id default: use contact_id from data of _senders[0].id
+     */
+    EgwApp.prototype.openCRMview = function (_action, _senders) {
+        var contact_id = _senders;
+        if (typeof _senders === 'object') {
+            var data = egw.dataGetUIDdata(_senders[0].id);
+            contact_id = data.data.contact_id;
+        }
+        if (typeof contact_id !== 'undefined') {
+            var crm_list_1 = egw.preference('crm_list', 'addressbook');
+            if (!crm_list_1 || crm_list_1 === '~edit~')
+                crm_list_1 = 'infolog';
+            var open_1 = function (_title) {
+                var title = _title || this.egw.link_title('addressbook', contact_id, open_1);
+                if (title) {
+                    this.egw.openTab(contact_id, 'addressbook', 'view', {
+                        crm_list: crm_list_1
+                    }, {
+                        displayName: title,
+                        icon: this.egw.link('/api/avatar.php', {
+                            contact_id: contact_id,
+                            etag: (new Date).valueOf() / 86400 | 0 // cache for a day, better then no invalidation
+                        }),
+                        refreshCallback: 'app.addressbook.view_refresh',
+                        id: contact_id + '-' + crm_list_1
+                    });
+                }
+            }.bind(this);
+            open_1();
+        }
+    };
     EgwApp.prototype._do_action = function (action_id, selected) {
     };
     /**
diff --git a/api/js/jsapi/egw_app.ts b/api/js/jsapi/egw_app.ts
index 251a7488e5..8a073ac2e1 100644
--- a/api/js/jsapi/egw_app.ts
+++ b/api/js/jsapi/egw_app.ts
@@ -292,6 +292,47 @@ export abstract class EgwApp
 		egw.open(id_app[1], this.appname);
 	}
 
+	/**
+	 * Open a CRM view for a contact
+	 *
+	 * @param _action
+	 * @param _senders
+	 * @param _contact_id default: use contact_id from data of _senders[0].id
+	 */
+	openCRMview(_action, _senders)
+	{
+		let contact_id = _senders;
+		if (typeof _senders === 'object')
+		{
+			let data = egw.dataGetUIDdata(_senders[0].id);
+			contact_id = data.data.contact_id;
+		}
+		if (typeof contact_id !== 'undefined')
+		{
+			let crm_list = egw.preference('crm_list', 'addressbook');
+			if (!crm_list || crm_list === '~edit~') crm_list = 'infolog';
+			let open = function(_title)
+			{
+				let title = _title || this.egw.link_title('addressbook', contact_id, open);
+				if (title)
+				{
+					this.egw.openTab(contact_id,'addressbook', 'view', {
+						crm_list: crm_list
+					}, {
+						displayName: title,
+						icon: this.egw.link('/api/avatar.php', {
+							contact_id: contact_id,
+							etag: (new Date).valueOf()/86400|0	// cache for a day, better then no invalidation
+						}),
+						refreshCallback: 'app.addressbook.view_refresh',
+						id: contact_id + '-'+crm_list
+					});
+				}
+			}.bind(this);
+			open();
+		}
+	}
+
 	_do_action(action_id : string, selected : [])
 	{
 	}
diff --git a/calendar/inc/class.calendar_so.inc.php b/calendar/inc/class.calendar_so.inc.php
index 3ed58130d2..a640128d26 100644
--- a/calendar/inc/class.calendar_so.inc.php
+++ b/calendar/inc/class.calendar_so.inc.php
@@ -1214,12 +1214,18 @@ class calendar_so
 			'filter'=> $filter,
 			'query' => $query,
 		));
-		foreach(self::$integration_data as $data)
+		foreach(self::$integration_data as $app => $data)
 		{
-			if (is_array($data['selects']))
+			foreach(isset($data[1]) ? $data : [$data] as $key => $data)
 			{
-				//echo $app; _debug_array($data);
-				$selects = array_merge($selects,$data['selects']);
+				// create a flat array, if app implementes multiple hooks using given app-name
+				self::$integration_data[$data['selects'][0]['app']] = $data;
+
+				if (is_array($data['selects']))
+				{
+					//echo $app; _debug_array($data);
+					$selects = array_merge($selects,$data['selects']);
+				}
 			}
 		}
 	}
diff --git a/calendar/js/et2_widget_event.js b/calendar/js/et2_widget_event.js
index 68ca793010..54d82c5f8f 100644
--- a/calendar/js/et2_widget_event.js
+++ b/calendar/js/et2_widget_event.js
@@ -1057,7 +1057,20 @@ var et2_calendar_event = /** @class */ (function (_super) {
                         break;
                     case 'series':
                     case 'single':
-                        egw.open(edit_id, event_data.app || 'calendar', 'edit', extra_params);
+                        // ToDo: find a nicer way to open CRM view for calls
+                        if (event_data.app === 'stylite') {
+                            var contact_id = void 0;
+                            for (var uid in event_data.participants) {
+                                if (typeof uid === 'string' && uid[0] === 'c') {
+                                    contact_id = parseInt(uid.substr(1));
+                                }
+                            }
+                            if (contact_id)
+                                app.calendar.openCRMview({}, contact_id);
+                        }
+                        else {
+                            egw.open(edit_id, event_data.app || 'calendar', 'edit', extra_params);
+                        }
                         break;
                     case 'cancel':
                     default:
diff --git a/calendar/js/et2_widget_event.ts b/calendar/js/et2_widget_event.ts
index 73d6affb46..efaf762374 100644
--- a/calendar/js/et2_widget_event.ts
+++ b/calendar/js/et2_widget_event.ts
@@ -1334,7 +1334,23 @@ export class et2_calendar_event extends et2_valueWidget implements et2_IDetached
 						break;
 					case 'series':
 					case 'single':
-						egw.open(edit_id, event_data.app||'calendar', 'edit', extra_params);
+						// ToDo: find a nicer way to open CRM view for calls
+						if (event_data.app === 'stylite')
+						{
+							let contact_id;
+							for(let uid in event_data.participants)
+							{
+								if (typeof uid === 'string' && uid[0] === 'c')
+								{
+									contact_id = parseInt(uid.substr(1));
+								}
+							}
+							if (contact_id) app.calendar.openCRMview({}, contact_id);
+						}
+						else
+						{
+							egw.open(edit_id, event_data.app||'calendar', 'edit', extra_params);
+						}
 						break;
 					case 'cancel':
 					default: