Outlook 2010 mailbox cleanup not archiving all old email

Modified Date must be changed

Please follow the below steps:
1.Click Start, click Run, type regedit in the Open box, and then click OK.
2.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.
7.Restart Outlook.

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