diff --git a/Riot/Assets/en.lproj/Vector.strings b/Riot/Assets/en.lproj/Vector.strings
index 7985cbeb5..c78ecc45e 100644
--- a/Riot/Assets/en.lproj/Vector.strings
+++ b/Riot/Assets/en.lproj/Vector.strings
@@ -277,6 +277,9 @@
 "room_replacement_link" = "The conversation continues here.";
 "room_predecessor_information" = "This room is a continuation of another conversation.";
 "room_predecessor_link" = "Click here to see older messages.";
+"room_resource_limit_exceeded_message_contact_1" = " Please ";
+"room_resource_limit_exceeded_message_contact_2_link" = "contact your service administrator";
+"room_resource_limit_exceeded_message_contact_3" = " to continue using this service.";
 
 // Unknown devices
 "unknown_devices_alert_title" = "Room contains unknown devices";
diff --git a/Riot/Modules/Room/RoomViewController.m b/Riot/Modules/Room/RoomViewController.m
index d4d31dde3..9c886ebda 100644
--- a/Riot/Modules/Room/RoomViewController.m
+++ b/Riot/Modules/Room/RoomViewController.m
@@ -176,7 +176,10 @@
     
     // Observe kAppDelegateNetworkStatusDidChangeNotification to handle network status change.
     id kAppDelegateNetworkStatusDidChangeNotificationObserver;
-    
+
+    // Observers to manage MXSession state (and sync errors)
+    id kMXSessionStateDidChangeObserver;
+
     // Observers to manage ongoing conference call banner
     id kMXCallStateDidChangeObserver;
     id kMXCallManagerConferenceStartedObserver;
@@ -470,6 +473,7 @@
     [self listenCallNotifications];
     [self listenWidgetNotifications];
     [self listenTombstoneEventNotifications];
+    [self listenMXSessionStateChangeNotifications];
     
     if (self.showExpandedHeader)
     {
@@ -519,6 +523,7 @@
     [self removeCallNotificationsListeners];
     [self removeWidgetNotificationsListeners];
     [self removeTombstoneEventNotificationsListener];
+    [self removeMXSessionStateChangeNotificationsListener];
 
     // Re-enable the read marker display, and disable its update.
     self.roomDataSource.showReadMarker = YES;
@@ -1156,6 +1161,7 @@
     [self removeCallNotificationsListeners];
     [self removeWidgetNotificationsListeners];
     [self removeTombstoneEventNotificationsListener];
+    [self removeMXSessionStateChangeNotificationsListener];
 
     if (previewHeader || (self.expandedHeaderContainer.isHidden == NO))
     {
@@ -3872,8 +3878,21 @@
         }
 
         Widget *jitsiWidget = [customizedRoomDataSource jitsiWidget];
-        
-        if ([AppDelegate theDelegate].isOffline)
+
+        if ([self.roomDataSource.mxSession.syncError.errcode isEqualToString:kMXErrCodeStringResourceLimitExceeded])
+        {
+            [roomActivitiesView showResourceLimitExceededError:self.roomDataSource.mxSession.syncError.userInfo onAdminContactTapped:^(NSURL *adminContact) {
+                if ([[UIApplication sharedApplication] canOpenURL:adminContact])
+                {
+                    [[UIApplication sharedApplication] openURL:adminContact];
+                }
+                else
+                {
+                    NSLog(@"[RoomVC] refreshActivitiesViewDisplay: adminContact(%@) cannot be opened", adminContact);
+                }
+            }];
+        }
+        else if ([AppDelegate theDelegate].isOffline)
         {
             [roomActivitiesView displayNetworkErrorNotification:NSLocalizedStringFromTable(@"room_offline_notification", @"Vector", nil)];
         }
@@ -4810,5 +4829,29 @@
     }
 }
 
+#pragma mark MXSession state change
+
+- (void)listenMXSessionStateChangeNotifications
+{
+    kMXSessionStateDidChangeObserver = [[NSNotificationCenter defaultCenter] addObserverForName:kMXSessionStateDidChangeNotification object:self.roomDataSource.mxSession queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *notif) {
+
+        if (self.roomDataSource.mxSession.state == MXSessionStateSyncError
+            || self.roomDataSource.mxSession.state == MXSessionStateRunning)
+        {
+            [self refreshActivitiesViewDisplay];
+            [self refreshRoomInputToolbar];
+        }
+    }];
+}
+
+- (void)removeMXSessionStateChangeNotificationsListener
+{
+    if (kMXSessionStateDidChangeObserver)
+    {
+        [[NSNotificationCenter defaultCenter] removeObserver:kMXSessionStateDidChangeObserver];
+        kMXSessionStateDidChangeObserver = nil;
+    }
+}
+
 @end
 
diff --git a/Riot/Modules/Room/Views/Activities/RoomActivitiesView.h b/Riot/Modules/Room/Views/Activities/RoomActivitiesView.h
index fc695bea6..df8b66581 100644
--- a/Riot/Modules/Room/Views/Activities/RoomActivitiesView.h
+++ b/Riot/Modules/Room/Views/Activities/RoomActivitiesView.h
@@ -85,6 +85,14 @@
  */
 - (void)displayRoomReplacementWithRoomLinkTappedHandler:(void (^)(void))onRoomReplacementLinkTapped;
 
+/**
+ Display a kMXErrCodeStringResourceLimitExceeded error received during a /sync request.
+
+ @param errorDict the error data.
+ @param onAdminContactTapped a callback indicating if the user wants to contact their admin.
+ */
+- (void)showResourceLimitExceededError:(NSDictionary *)errorDict onAdminContactTapped:(void (^)(NSURL *adminContact))onAdminContactTapped;
+
 /**
  Remove any displayed information.
  */
diff --git a/Riot/Modules/Room/Views/Activities/RoomActivitiesView.m b/Riot/Modules/Room/Views/Activities/RoomActivitiesView.m
index 56dc9b1b7..2634ed57a 100644
--- a/Riot/Modules/Room/Views/Activities/RoomActivitiesView.m
+++ b/Riot/Modules/Room/Views/Activities/RoomActivitiesView.m
@@ -374,6 +374,78 @@
     [self checkHeight:YES];
 }
 
+- (void)showResourceLimitExceededError:(NSDictionary *)errorDict onAdminContactTapped:(void (^)(NSURL *adminContact))onAdminContactTapped
+{
+    [self reset];
+
+    CGFloat fontSize = 15;
+
+    // Parse error data
+    NSString *limitType, *adminContactString;
+    NSURL *adminContact;
+
+    MXJSONModelSetString(limitType, errorDict[kMXErrorResourceLimitExceededLimitTypeKey]);
+    MXJSONModelSetString(adminContactString, errorDict[kMXErrorResourceLimitExceededAdminContactKey]);
+
+    if (adminContactString)
+    {
+        adminContact = [NSURL URLWithString:adminContactString];
+    }
+
+    // Build the message content
+    // Reuse MatrixKit as is for the beginning
+    NSMutableString *message = [NSMutableString new];
+    if ([limitType isEqualToString:kMXErrorResourceLimitExceededLimitTypeMonthlyActiveUserValue])
+    {
+        [message appendString:[NSBundle mxk_localizedStringForKey:@"login_error_resource_limit_exceeded_message_monthly_active_user"]];
+    }
+    else
+    {
+        [message appendString:[NSBundle mxk_localizedStringForKey:@"login_error_resource_limit_exceeded_message_default"]];
+    }
+
+    NSDictionary *messageContact2LinkAttributes;
+    if (adminContact && onAdminContactTapped)
+    {
+        void (^onAdminContactTappedLink)(void) = ^() {
+            onAdminContactTapped(adminContact);
+        };
+
+        objc_setAssociatedObject(self.messageTextView, "onAdminContactTappedLink", [onAdminContactTappedLink copy], OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+        messageContact2LinkAttributes = @{
+                                             NSFontAttributeName : [UIFont systemFontOfSize:fontSize],
+                                             NSUnderlineStyleAttributeName : @(NSUnderlineStyleSingle),
+                                             NSLinkAttributeName : @"onAdminContactTappedLink",
+                                             };
+    }
+
+    NSDictionary *attributes = @{
+                                 NSFontAttributeName: [UIFont systemFontOfSize:fontSize],
+                                 NSForegroundColorAttributeName: kRiotPrimaryBgColor
+                                 };
+
+    NSAttributedString *messageContact1 = [[NSAttributedString alloc] initWithString:NSLocalizedStringFromTable(@"room_resource_limit_exceeded_message_contact_1", @"Vector", nil) attributes:attributes];
+    NSAttributedString *messageContact2Link =  [[NSAttributedString alloc] initWithString:NSLocalizedStringFromTable(@"room_resource_limit_exceeded_message_contact_2_link", @"Vector", nil) attributes:messageContact2LinkAttributes];
+    NSAttributedString *messageContact3 = [[NSAttributedString alloc] initWithString:NSLocalizedStringFromTable(@"room_resource_limit_exceeded_message_contact_3", @"Vector", nil) attributes:attributes];
+
+    NSMutableAttributedString *attributedText = [[NSMutableAttributedString alloc] initWithString:message attributes:attributes];
+    [attributedText appendAttributedString:messageContact1];
+    [attributedText appendAttributedString:messageContact2Link];
+    [attributedText appendAttributedString:messageContact3];
+
+    self.messageTextView.attributedText = attributedText;
+    self.messageTextView.tintColor = kRiotPrimaryBgColor;
+    self.messageTextView.hidden = NO;
+
+    self.backgroundColor = kRiotColorPinkRed;
+    self.messageTextView.backgroundColor = kRiotColorPinkRed;
+
+    // Hide the separator to display correctly the banner
+    self.separatorView.hidden = YES;
+
+    [self checkHeight:YES];
+}
+
 - (void)reset
 {
     self.separatorView.hidden = NO;
@@ -476,6 +548,16 @@
         
         return NO;
     }
+    else if ([[URL absoluteString] isEqualToString:@"onAdminContactTappedLink"])
+    {
+        void (^onAdminContactTappedLink)(void) = objc_getAssociatedObject(self.messageTextView, "onAdminContactTappedLink");
+        if (onAdminContactTappedLink)
+        {
+            onAdminContactTappedLink();
+        }
+
+        return NO;
+    }
     
     return YES;
 }