diff --git a/NEWS b/NEWS
index 7e94ecd64..506495dc7 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,9 @@
 master
 ------
 
+Enhancements
+ - Improve sync speed from Outlook by non-reprocessing already downloaded unread mails
+
 Bug fixes
  - Sent mails are not longer in Drafts folder using Outlook
  - Fix server side crash parsing rtf emails with images (with word97 format)
diff --git a/OpenChange/MAPIStoreMailFolder.m b/OpenChange/MAPIStoreMailFolder.m
index 5c70dc634..ba2339586 100644
--- a/OpenChange/MAPIStoreMailFolder.m
+++ b/OpenChange/MAPIStoreMailFolder.m
@@ -1485,7 +1485,6 @@ _parseCOPYUID (NSString *line, NSArray **destUIDsP)
   NGImap4Client *client;
   NSArray *fetch;
   NSData *bodyContent;
-  NSMutableArray *unseenUIDs;
 
   if (tableType == MAPISTORE_MESSAGE_TABLE)
     {
@@ -1496,7 +1495,6 @@ _parseCOPYUID (NSString *line, NSArray **destUIDsP)
         {
           bodyPartKeys = [NSMutableSet setWithCapacity: max];
 
-          unseenUIDs = [NSMutableArray arrayWithCapacity: max];
           keyAssoc = [NSMutableDictionary dictionaryWithCapacity: max];
           for (count = 0; count < max; count++)
             {
@@ -1509,23 +1507,22 @@ _parseCOPYUID (NSString *line, NSArray **destUIDsP)
                     {
                       [bodyPartKeys addObject: bodyPartKey];
                       messageUid = [self messageUIDFromMessageKey: messageKey];
-                      [keyAssoc setObject: bodyPartKey forKey: messageUid];
-                      /* Fetch flags to remove seen flag if required,
-                         as fetching a message body set the seen flag.
-                         We are not using body.peek[] as
-                         bodyContentPartKey explicitly avoids it.
+                      /* If the bodyPartKey include peek, remove it as it is not returned
+                         as key in the IMAP server response.
+
+                         IMAP conversation example:
+                         a4 UID FETCH 1 (UID BODY.PEEK[text])
+                         * 1 FETCH (UID 1 BODY[TEXT] {1677}
                       */
-                      if (![message read])
-                        {
-                          [unseenUIDs addObject: messageUid];
-                        }
+                      bodyPartKey = [bodyPartKey stringByReplacingOccurrencesOfString: @"body.peek"
+                                                                           withString: @"body"];
+                      [keyAssoc setObject: bodyPartKey forKey: messageUid];
                     }
                 }
             }
       
           client = [[(SOGoMailFolder *) sogoObject imap4Connection] client];
           [client select: [sogoObject absoluteImap4Name]];
-
           response = [client fetchUids: [keyAssoc allKeys]
                              parts: [bodyPartKeys allObjects]];
           fetch = [response objectForKey: @"fetch"];
@@ -1547,14 +1544,6 @@ _parseCOPYUID (NSString *line, NSArray **destUIDsP)
                     }
                 }
             }
-
-          /* Restore unseen state once the body has been fetched */
-          if ([unseenUIDs count] > 0)
-            {
-              response = [client storeFlags: [NSArray arrayWithObjects: @"seen", nil]
-                                    forUIDs: unseenUIDs
-                                addOrRemove: NO];
-            }
         }
     }
 
diff --git a/OpenChange/MAPIStoreMailMessage.h b/OpenChange/MAPIStoreMailMessage.h
index 2f6192c16..fffd0c422 100644
--- a/OpenChange/MAPIStoreMailMessage.h
+++ b/OpenChange/MAPIStoreMailMessage.h
@@ -74,7 +74,6 @@
 /* batch-mode helpers */
 - (NSString *) bodyContentPartKey;
 - (void) setBodyContentFromRawData: (NSData *) rawContent;
-- (BOOL) read; /* Unseen from sogoObject */
 
 @end
 
diff --git a/OpenChange/MAPIStoreMailMessage.m b/OpenChange/MAPIStoreMailMessage.m
index 4c6fba488..8c35f4265 100644
--- a/OpenChange/MAPIStoreMailMessage.m
+++ b/OpenChange/MAPIStoreMailMessage.m
@@ -1627,11 +1627,7 @@ _compareBodyKeysByPriority (id entry1, id entry2, void *data)
   if (!headerSetup)
     [self _fetchHeaderData];
 
-  if ([mimeKey hasPrefix: @"body.peek"])
-    bodyPartKey = [NSString stringWithFormat: @"body[%@]",
-                          [mimeKey _strippedBodyKey]];
-  else
-    bodyPartKey = mimeKey;
+  bodyPartKey = mimeKey;
 
   return bodyPartKey;
 }
@@ -1660,12 +1656,4 @@ _compareBodyKeysByPriority (id entry1, id entry2, void *data)
     }
 }
 
-- (BOOL) read
-{
-  if (!headerSetup)
-    [self _fetchHeaderData];
-
-  return [sogoObject read];
-}
-
 @end