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.
