
Vsmacros, msh2xml, msh1xml, ps2xml, ps1xml, mshxml, gadget, mhtml, psc2, psc1, msh2,msh1, aspx, xml, wsh, wsf, wsc, vsw, vst, vss, vbs, vbe, url, tmp, shs, shb, sct,scr, scf, reg, pst, ps2, ps1, prg, prf, plg, pif, pcd, ops, mst, msp, msi, msh,msc, mht, mdz, mdw, mdt, mde, mdb, mda, maw, mav, mau, mat, mas, mar, maq, mam,mag, maf, mad, lnk, ksh, jse, its, isp, ins, inf, htc, hta, hlp, fxp, exe, der,csh, crt, cpl, com, cmd, chm, cer, bat, bas, asx, asp, app, adp, ade, ws, vb, js SolutionĬhange the Outlook Web App mailbox policy to include and exclude the file types that you want.

By default, Outlook Web App blocks attachments that have the following file name extensions: This issue occurs if the attachment is blocked by Outlook Web App.

Instead, a generic placeholder, such as "1 Attachment" is displayed, and this can't be opened. In Office 365, the attachment isn't displayed in the message.

When Office 365 users try to open or view attachments in email messages in Outlook Web App, they experience the following symptoms:
