diff --git a/Documentation/SOGoInstallationGuide.asciidoc b/Documentation/SOGoInstallationGuide.asciidoc
index f57e77c25..879d1dde7 100644
--- a/Documentation/SOGoInstallationGuide.asciidoc
+++ b/Documentation/SOGoInstallationGuide.asciidoc
@@ -684,6 +684,9 @@ Possible values are:
 
 Defaults to `NO` when unset.
 
+|S |SOGoDisableSharing
+|List of modules where sharing should be disabled, for example `(Mail, Calendar)`. Modules can be `Mail`, `Contacts` and `Calendar`. Default value empty list (sharing enabled for everybody).
+
 |S |SOGoPasswordChangeEnabled
 |Parameter used to allow or not users to change their passwords from
 SOGo.
diff --git a/SoObjects/SOGo/SOGoSystemDefaults.h b/SoObjects/SOGo/SOGoSystemDefaults.h
index adcf9f070..bb9f0ebbf 100644
--- a/SoObjects/SOGo/SOGoSystemDefaults.h
+++ b/SoObjects/SOGo/SOGoSystemDefaults.h
@@ -22,6 +22,11 @@
 #define SOGOSYSTEMDEFAULTS_H
 
 #import <SOGo/SOGoDomainDefaults.h>
+#import <SOGo/NSString+Utilities.h>
+
+static const NSString *kDisableSharingMail = @"Mail";
+static const NSString *kDisableSharingContacts = @"Contacts";
+static const NSString *kDisableSharingCalendar = @"Calendar";
 
 @interface SOGoSystemDefaults : SOGoDomainDefaults
 {
@@ -121,6 +126,8 @@
 - (NSArray *) passwordRecoveryDomains;
 - (NSString *) JWTSecret;
 
+- (NSArray *) disableSharing;
+
 @end
 
 #endif /* SOGOSYSTEMDEFAULTS_H */
diff --git a/SoObjects/SOGo/SOGoSystemDefaults.m b/SoObjects/SOGo/SOGoSystemDefaults.m
index 6ad003906..fbd18c7db 100644
--- a/SoObjects/SOGo/SOGoSystemDefaults.m
+++ b/SoObjects/SOGo/SOGoSystemDefaults.m
@@ -791,5 +791,18 @@ _injectConfigurationFromFile (NSMutableDictionary *defaultsDict,
   return secret;
 }
 
+- (NSArray *) disableSharing
+{
+  static NSArray *disableSharing = nil;
+
+  if (!disableSharing)
+    {
+      disableSharing = [self stringArrayForKey: @"SOGoDisableSharing"];
+      [disableSharing retain];
+    }
+  
+  return disableSharing;
+}
+
 
 @end
diff --git a/UI/Common/UIxUserRightsEditor.m b/UI/Common/UIxUserRightsEditor.m
index 941a2be88..d03bee896 100644
--- a/UI/Common/UIxUserRightsEditor.m
+++ b/UI/Common/UIxUserRightsEditor.m
@@ -29,6 +29,7 @@
 #import <SOGo/SOGoDomainDefaults.h>
 #import <SOGo/SOGoUser.h>
 #import <SOGo/SOGoUserManager.h>
+#import <SOGo/SOGoSystemDefaults.h>
 
 #import <UI/SOGoUI/SOGoACLAdvisory.h>
 
@@ -258,12 +259,35 @@
   NSDictionary *currentUser, *jsonResponse;;
   NSEnumerator *usersList;
   NSString *currentUid;
-  NSArray *o;
+  NSArray *o, *reqPathArray;
+  SOGoSystemDefaults *sd;
 
   request = [[self context] request];
   response = [self responseWithStatus: 200];
   users = [[request contentAsString] objectFromJSONString];
   usersList = [users objectEnumerator];
+  reqPathArray = [request requestHandlerPathArray];
+  sd = [SOGoSystemDefaults sharedSystemDefaults];
+
+  // Disable sharing
+  if (NSNotFound != [reqPathArray indexOfObject: kDisableSharingMail]
+    && nil != [sd disableSharing] 
+    && NSNotFound != [[sd disableSharing] indexOfObject: kDisableSharingMail]) {
+      response = [self responseWithStatus: 403];
+      return response;
+  }
+   if (NSNotFound != [reqPathArray indexOfObject: kDisableSharingContacts]
+    && nil != [sd disableSharing] 
+    && NSNotFound != [[sd disableSharing] indexOfObject: kDisableSharingContacts]) {
+      response = [self responseWithStatus: 403];
+      return response;
+  }
+   if (NSNotFound != [reqPathArray indexOfObject: kDisableSharingCalendar]
+    && nil != [sd disableSharing] 
+    && NSNotFound != [[sd disableSharing] indexOfObject: kDisableSharingCalendar]) {
+      response = [self responseWithStatus: 403];
+      return response;
+  }
 
   while ((currentUser = [usersList nextObject]))
     {
diff --git a/UI/Contacts/UIxContactFoldersView.m b/UI/Contacts/UIxContactFoldersView.m
index 50efa560d..87ad98f0f 100644
--- a/UI/Contacts/UIxContactFoldersView.m
+++ b/UI/Contacts/UIxContactFoldersView.m
@@ -493,6 +493,20 @@ Class SOGoContactSourceFolderK, SOGoGCSFolderK;
   return [self responseWithStatus: 204];
 }
 
+- (BOOL) isContactSharingEnabled {
+  BOOL result;
+  SOGoSystemDefaults *sd;
+
+  result = YES;
+  sd = [SOGoSystemDefaults sharedSystemDefaults];
+  if (nil != [sd disableSharing] 
+    && NSNotFound != [[sd disableSharing] indexOfObject: kDisableSharingContacts]) {
+      result = NO;
+  }
+
+  return result;
+}
+
 - (id) defaultAction
 {
   // NSString *check;
diff --git a/UI/MailerUI/UIxMailMainFrame.m b/UI/MailerUI/UIxMailMainFrame.m
index 73d62e5f4..caa4275aa 100644
--- a/UI/MailerUI/UIxMailMainFrame.m
+++ b/UI/MailerUI/UIxMailMainFrame.m
@@ -42,6 +42,7 @@
 #import <SOGo/NSString+Utilities.h>
 #import <SOGo/NSDictionary+Utilities.h>
 #import <SOGo/SOGoDomainDefaults.h>
+#import <SOGo/SOGoSystemDefaults.h>
 #import <SOGo/SOGoUser.h>
 #import <SOGo/SOGoUserFolder.h>
 #import <SOGo/SOGoUserSettings.h>
@@ -582,6 +583,20 @@
   return _currentLabel;
 }
 
+- (BOOL) isMailSharingEnabled {
+  BOOL result;
+  SOGoSystemDefaults *sd;
+
+  result = YES;
+  sd = [SOGoSystemDefaults sharedSystemDefaults];
+  if (nil != [sd disableSharing] 
+    && NSNotFound != [[sd disableSharing] indexOfObject: kDisableSharingMail]) {
+      result = NO;
+  }
+
+  return result;
+}
+
 @end /* UIxMailMainFrame */
 
 @interface UIxMailFolderTemplate : UIxComponent
diff --git a/UI/Scheduler/UIxCalMainView.m b/UI/Scheduler/UIxCalMainView.m
index 38b358177..450b7c14c 100644
--- a/UI/Scheduler/UIxCalMainView.m
+++ b/UI/Scheduler/UIxCalMainView.m
@@ -32,6 +32,7 @@
 #import <SOGo/SOGoUser.h>
 #import <SOGo/SOGoUserDefaults.h>
 #import <SOGo/SOGoUserSettings.h>
+#import <SOGo/SOGoSystemDefaults.h>
 
 #import <Appointments/SOGoAppointmentFolders.h>
 
@@ -361,6 +362,20 @@
   return repeatFrequencies;
 }
 
+- (BOOL) isCalendarSharingEnabled {
+  BOOL result;
+  SOGoSystemDefaults *sd;
+
+  result = YES;
+  sd = [SOGoSystemDefaults sharedSystemDefaults];
+  if (nil != [sd disableSharing] 
+    && NSNotFound != [[sd disableSharing] indexOfObject: kDisableSharingCalendar]) {
+      result = NO;
+  }
+
+  return result;
+}
+
 @end
 
 /* Component Viewer, parent class of Appointment Viewer and Task Viewer */
diff --git a/UI/Templates/ContactsUI/UIxContactFoldersView.wox b/UI/Templates/ContactsUI/UIxContactFoldersView.wox
index e33588a2f..04a902328 100644
--- a/UI/Templates/ContactsUI/UIxContactFoldersView.wox
+++ b/UI/Templates/ContactsUI/UIxContactFoldersView.wox
@@ -109,12 +109,14 @@
                       <var:string label:value="Export"/>
                     </md-button>
                   </md-menu-item>
-                  <md-menu-divider><!-- divider --></md-menu-divider>
-                  <md-menu-item>
-                    <md-button type="button" ng-click="app.share(folder)">
-                      <var:string label:value="Sharing..."/>
-                    </md-button>
-                  </md-menu-item>
+                  <var:if condition="isContactSharingEnabled">
+                    <md-menu-divider><!-- divider --></md-menu-divider>
+                    <md-menu-item>
+                      <md-button type="button" ng-click="app.share(folder)">
+                        <var:string label:value="Sharing..."/>
+                      </md-button>
+                    </md-menu-item>
+                  </var:if>
                 </md-menu-content>
               </md-menu>
             </md-list-item>
diff --git a/UI/Templates/MailerUI/UIxMailMainFrame.wox b/UI/Templates/MailerUI/UIxMailMainFrame.wox
index f2644bf90..b5edda3c1 100644
--- a/UI/Templates/MailerUI/UIxMailMainFrame.wox
+++ b/UI/Templates/MailerUI/UIxMailMainFrame.wox
@@ -279,12 +279,14 @@
             <var:string label:value="Set as Templates"/>
           </md-button>
         </md-menu-item>
-        <md-divider ng-show="::($menuCtrl.folder.type != 'additional')"><!-- divider --></md-divider>
-        <md-menu-item ng-show="::($menuCtrl.folder.type != 'additional')">
-          <md-button type="button" ng-click="$menuCtrl.share()">
-            <var:string label:value="Sharing..."/>
-          </md-button>
-        </md-menu-item>
+        <var:if condition="isMailSharingEnabled">
+          <md-divider ng-show="::($menuCtrl.folder.type != 'additional')"><!-- divider --></md-divider>
+          <md-menu-item ng-show="::($menuCtrl.folder.type != 'additional')">
+            <md-button type="button" ng-click="$menuCtrl.share()">
+              <var:string label:value="Sharing..."/>
+            </md-button>
+          </md-menu-item>
+        </var:if>
       </md-menu-content>
     </div>
   </script>
diff --git a/UI/Templates/SchedulerUI/UIxCalMainView.wox b/UI/Templates/SchedulerUI/UIxCalMainView.wox
index 9de8a6f8f..ab4714d65 100644
--- a/UI/Templates/SchedulerUI/UIxCalMainView.wox
+++ b/UI/Templates/SchedulerUI/UIxCalMainView.wox
@@ -583,15 +583,17 @@
             <var:string label:value="Export"/>
           </md-button>
         </md-menu-item>
-        <md-divider
-            ng-hide="::($menuCtrl.calendar.isSubscription || $menuCtrl.calendar.isWebCalendar)">
-          <!-- divider -->
-        </md-divider>
-        <md-menu-item ng-hide="::($menuCtrl.calendar.isSubscription || $menuCtrl.calendar.isWebCalendar)">
-          <md-button ng-click="$menuCtrl.share()">
-            <var:string label:value="Sharing..."/>
-          </md-button>
-        </md-menu-item>
+        <var:if condition="isCalendarSharingEnabled">
+          <md-divider
+              ng-hide="::($menuCtrl.calendar.isSubscription || $menuCtrl.calendar.isWebCalendar)">
+            <!-- divider -->
+          </md-divider>
+          <md-menu-item ng-hide="::($menuCtrl.calendar.isSubscription || $menuCtrl.calendar.isWebCalendar)">
+            <md-button ng-click="$menuCtrl.share()">
+              <var:string label:value="Sharing..."/>
+            </md-button>
+          </md-menu-item>
+        </var:if>
       </md-menu-content>
     </div>
   </script>