Outlook Web Access-Problemas con datos adjuntos

Buenas estimados foreros

Mi problema es el siguiente, yo reviso mi correo por outlook web access pero cuando me envian datos ajuntos y los descargo siempre me los baja en un winzip, por mas q sea un archivo de word, excel, pdf... lo q sea... todo me lo baja y me lo abre en un zip... Como cambio esa opcion?

Gracias de antemano!

How to Configure Attachment Blocking in Outlook Web Access on Exchange Server 2003

How to Configure Attachment Blocking in Outlook Web Access on Exchange Server 2003

There are 2 levels of file attachments for Outlook Web Access. Level1 attachments have file extensions that are prohibited from accessing by OWA. Level2 attachments have file extensions that can be accessed, but ************SPAM/BANNEAR************ if saved to the client's file system first. OWA is installed with a default set of file extensions for the two levels as shown in the following registry keys:

Location: HKLM\System\CurrentControlSet\Services\MSExchangeWeb\OWA
Value: Level1FileTypes
Type: REG_SZ
Value Data: ade, adp, app, asx, bas, bat, chm, cmd, com, cpl, crt, csh, exe, fxp, hlp, hta, inf, ins, isp, js, jse, ksh, lnk, mda, mdb, mde, mdt, mdw, mdz, msc, msi, msp, mst, ops, pcd, pif, prf, prg, reg, scf, scr, sct, shb, shs, url, vb, vbe, vbs, wsc, wsf, wsh

Location: HKLM\System\CurrentControlSet\Services\MSExchangeWeb\OWA
Value: Level2FileTypes
Type: REG_SZ
Value Data: ade, adp, asx, bas, bat, chm, cmd, com, cpl, crt, exe, hlp, hta, htm, html, htc, inf, ins, isp, js, jse, lnk, mda, mdb, mde, mdz, mht, mhtml, msc, msi, msp, mst, pcd, pif, prf, reg, scf, scr, sct, shb, shs, shtm, shtml, stm, url, vb, vbe, vbs, wsc, wsf, wsh, xml, dir, dcr, plg, spl, swf

Attachments listed should be separated by a comma with no space.

Manillo sigo esto HKLM\System\CurrentControlSet\Services\MSExchangeW eb\OWA
pero llego hasta Services ya la parte de MSExchangeW eb no me aparece en el regedit.
Q puedo hacer? Eso me pasa en las dos varas, tanto en el nivel 1 como el 2