Hi everybody, When I try to open a digital signed Microsoft Word document wich is in a sharepoint document library using a Office Web App, it shows me a error and i have to open it in the desktop regular word app. Could anybody solve my issue? Thanks in advaced.

Hi David, Please check out this link it says how to create signature compatible with SharePoint: http://www.arx.com/forum/showthread.php?38-How-To-Signing-and-Validating-Signatures-in-Word-and-Excel-Documents For more information, please refer to the following link: http://office.microsoft.com/en-us/sharepoint-server-help/add-a-digital-signature-to-a-browser-enabled-form-HA010288410.aspx Thanks, Lhan Han