Archiving is not working as expected in Outlook 2010

What:

Outlook 2010 on Windows 7

Problem:

Outlook archives items by last modified date instead of using received date, this cause many items not being archived at all.

Solution:

1. Close Outlook, click Start, click Run, type regedit and then click OK.
2. Locate and then click on the following registry subkey: 
   HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Preferences
3. On the Edit menu, point to New, click DWORD Value, type ArchiveIgnoreLastModifiedTime, and then press ENTER.
4. Right-click ArchiveIgnoreLastModifiedTime, and then click Modify.
5. In the Value data box, type 1, and then click OK.
6. Exit Registry Editor.

You can also create reg file to make it simpler to apply.

Copy and Paste the following code into Notepad and save the file as "ArchivebyReceivedDatefix.reg" then double click on it to apply new settings.

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Preferences]
"ArchiveIgnoreLastModifiedTime"=dword:00000001

http://support.microsoft.com/kb/2553550