diff --git a/dictionaries/ui/layouts/en.dictionary.itop.activity-panel.php b/dictionaries/ui/layouts/en.dictionary.itop.activity-panel.php
index 36e9f2a22..73d4bc77d 100644
--- a/dictionaries/ui/layouts/en.dictionary.itop.activity-panel.php
+++ b/dictionaries/ui/layouts/en.dictionary.itop.activity-panel.php
@@ -25,17 +25,17 @@ Dict::Add('EN US', 'English', 'English', array(
 	// Activity tab
 	'UI:Layout:ActivityPanel:Tab:Activity:Title' => 'Activity',
 	'UI:Layout:ActivityPanel:Tab:Activity:Toolbar:CaselogsFilter:Title' => 'Case logs',
-	'UI:Layout:ActivityPanel:Tab:Activity:Toolbar:CaselogsFilter:Tooltip' => 'Show / hide case log entries',
+	'UI:Layout:ActivityPanel:Tab:Activity:Toolbar:CaselogsFilter:Tooltip' => 'Show / hide case log entries on this tab',
 	'UI:Layout:ActivityPanel:Tab:Activity:Toolbar:TransitionsFilter:Title' => 'State changes',
-	'UI:Layout:ActivityPanel:Tab:Activity:Toolbar:TransitionsFilter:Tooltip' => 'Show / hide state changes',
+	'UI:Layout:ActivityPanel:Tab:Activity:Toolbar:TransitionsFilter:Tooltip' => 'Show / hide state changes on this tab',
 	'UI:Layout:ActivityPanel:Tab:Activity:Toolbar:EditsFilter:Title' => 'Edits',
-	'UI:Layout:ActivityPanel:Tab:Activity:Toolbar:EditsFilter:Tooltip' => 'Show / hide fields edits',
+	'UI:Layout:ActivityPanel:Tab:Activity:Toolbar:EditsFilter:Tooltip' => 'Show / hide fields edits on this tab',
 
 	// Case log tab
 	'UI:Layout:ActivityPanel:Tab:Caselog:Toolbar:OpenAll:Tooltip' => 'Open all messages',
 	'UI:Layout:ActivityPanel:Tab:Caselog:Toolbar:CloseAll:Tooltip' => 'Close all messages',
-	'UI:Layout:ActivityPanel:Tab:Caselog:Toolbar:AuthorsCount:Tooltip' => 'Number of persons interacting in this log',
-	'UI:Layout:ActivityPanel:Tab:Caselog:Toolbar:MessagesCount:Tooltip' => 'Number of messages in this log',
+	'UI:Layout:ActivityPanel:Tab:Caselog:Toolbar:AuthorsCount:Tooltip' => 'Number of persons interacting in the visible entries',
+	'UI:Layout:ActivityPanel:Tab:Caselog:Toolbar:MessagesCount:Tooltip' => 'Number of messages in the visible log(s)',
 
 	// Placeholder
 	'UI:Layout:ActivityPanel:NoEntry:Placeholder:Hint' => 'It\'s calm up here, no activity yet',
diff --git a/js/layouts/activity-panel/activity-panel.js b/js/layouts/activity-panel/activity-panel.js
index 1f4f5595c..d2e88df76 100644
--- a/js/layouts/activity-panel/activity-panel.js
+++ b/js/layouts/activity-panel/activity-panel.js
@@ -42,9 +42,11 @@ $(function()
 				tab_toggler: '[data-role="ibo-activity-panel--tab-toggler"]',
 				tab_title: '[data-role="ibo-activity-panel--tab-title"]',
 				tab_toolbar: '[data-role="ibo-activity-panel--tab-toolbar"]',
-				activity_filter: '[data-role="ibo-activity-panel--activity-filter"]',
 				caselog_tab_open_all: '[data-role="ibo-activity-panel--caselog-open-all"]',
 				caselog_tab_close_all: '[data-role="ibo-activity-panel--caselog-close-all"]',
+				activity_filter: '[data-role="ibo-activity-panel--activity-filter"]',
+				authors_count: '[data-role="ibo-activity-panel--tab-toolbar-info-authors-count"]',
+				messages_count: '[data-role="ibo-activity-panel--tab-toolbar-info-messages-count"]',
 				compose_button: '[data-role="ibo-activity-panel--add-caselog-entry-button"]',
 				caselog_entry_form: '[data-role="ibo-caselog-entry-form"]',
 				entry_group: '[data-role="ibo-activity-panel--entry-group"]',
@@ -59,6 +61,11 @@ $(function()
 				tab_types: {
 					caselog: 'caselog',
 					activity: 'activity',
+				},
+				entry_types: {
+					caselog: 'caselog',
+					transition: 'transition',
+					edits: 'edits',
 				}
 			},
 
@@ -67,6 +74,7 @@ $(function()
 			{
 				this.element.addClass('ibo-activity-panel');
 				this._bindEvents();
+				this._UpdateMessagesCounters();
 				this._ReformatDateTimes();
 
 				// TODO 3.0.0: Modify PopoverMenu so we can pass it the ID of the block triggering the open/close
@@ -390,6 +398,40 @@ $(function()
 
 				this.element.find(this.js_selectors.entry + sExtraSelector)[sCallback](this.css_classes.is_closed);
 			},
+			/**
+			 * Update the messages and users counters in the tabs toolbar
+			 *
+			 * @return {void}
+			 * @private
+			 */
+			_UpdateMessagesCounters: function()
+			{
+				const me = this;
+				let iMessagesCount = 0;
+				let iUsersCount = 0;
+				let oUsers = {};
+
+				// Compute counts
+				this.element.find(this.js_selectors.entry + ':visible').each(function(){
+					// Increase messages count
+					if (me.enums.entry_types.caselog === $(this).attr('data-entry-type')) {
+						iMessagesCount++;
+					}
+
+					// Feed authors array so we can count them later
+					try {
+						oUsers[$(this).attr('data-entry-author-login')] = true;
+					}
+					catch (sError) {
+						// Do nothing, this is just in case the user's login has special chars that would break the object key
+					}
+				});
+				iUsersCount = Object.keys(oUsers).length;
+
+				// Update elements
+				this.element.find(this.js_selectors.messages_count).text(iMessagesCount);
+				this.element.find(this.js_selectors.authors_count).text(iUsersCount);
+			},
 
 			// - Helpers on entries
 			_ApplyEntriesFilters: function()
@@ -414,6 +456,7 @@ $(function()
 				});
 
 				this._UpdateEntryGroupsVisibility();
+				this._UpdateMessagesCounters();
 			},
 			_ShowAllEntries: function()
 			{
diff --git a/templates/base/layouts/activity-panel/tab-toolbar/layout.html.twig b/templates/base/layouts/activity-panel/tab-toolbar/layout.html.twig
index 6f7732576..86467ac92 100644
--- a/templates/base/layouts/activity-panel/tab-toolbar/layout.html.twig
+++ b/templates/base/layouts/activity-panel/tab-toolbar/layout.html.twig
@@ -38,14 +38,16 @@
 				</div>
 				<div class="ibo-activity-panel--tab-toolbar-right-actions">
 					{% block bTabToolbarRightActions %}
-						<span class="ibo-activity-panel--tab-toolbar-info ibo-activity-panel--tab-toolbar-info-authors-count" data-tooltip-content="{{ 'UI:Layout:ActivityPanel:Tab:Caselog:Toolbar:AuthorsCount:Tooltip'|dict_s }}">
-							<span class="ibo-activity-panel--tab-toolbar-info-text">-</span>
+						<span class="ibo-activity-panel--tab-toolbar-info" data-tooltip-content="{{ 'UI:Layout:ActivityPanel:Tab:Caselog:Toolbar:AuthorsCount:Tooltip'|dict_s }}">
+							<span class="ibo-activity-panel--tab-toolbar-info-text ibo-activity-panel--tab-toolbar-info-authors-count" data-role="ibo-activity-panel--tab-toolbar-info-authors-count">-</span>
 							<span class="ibo-activity-panel--tab-toolbar-info-icon fas fa-users"></span>
 						</span>
-						<span class="ibo-activity-panel--tab-toolbar-info ibo-activity-panel--tab-toolbar-info-messages-count" data-tooltip-content="{{ 'UI:Layout:ActivityPanel:Tab:Caselog:Toolbar:MessagesCount:Tooltip'|dict_s }}">
-							<span class="ibo-activity-panel--tab-toolbar-info-text">-</span>
-							<span class="ibo-activity-panel--tab-toolbar-info-icon fas fa-comment-alt"></span>
-						</span>
+                        {% if oUIBlock.HasCaseLogTabs() %}
+                            <span class="ibo-activity-panel--tab-toolbar-info" data-tooltip-content="{{ 'UI:Layout:ActivityPanel:Tab:Caselog:Toolbar:MessagesCount:Tooltip'|dict_s }}">
+                                <span class="ibo-activity-panel--tab-toolbar-info-text ibo-activity-panel--tab-toolbar-info-messages-count" data-role="ibo-activity-panel--tab-toolbar-info-messages-count">-</span>
+                                <span class="ibo-activity-panel--tab-toolbar-info-icon fas fa-comment-alt"></span>
+                            </span>
+                        {% endif %}
 					{% endblock %}
 				</div>
 			{% endblock %}