Unable view the pdf file in document viewer / workspace even when the PDF is a supported format.Issue Document viewer is enabled and PDF is the supported format. But while trying to view the PDF in workspace view, it shows "The file type is currently not supported" When we try to view the document in native UI, it redirects to https://<Instance Name>/sys_attachment_list.do?sysparm_nostack=true&sysparm_query=table_sys_id%3D<attachment sys id>&sysparm_first_row=1&sysparm_view= It downloads the document, it does not redirect to $viewer.do to further view the document in browser.CauseThough the file type is pdf, the content type could be different. The actual content type of a clean pdf file is application/pdf. Document viewer viewer supports only application/pdf content types for pdf file types. When a file is opened or edited with excel, spreadsheet or other file types and convert the document to pdf, it is possible that content type will be application/octet-stream. If the content type is application/octet-stream, systems considers that as a binary data and is not supported in document viewer.ResolutionActivated the document viewer in native UI for table x_robgh_bsh_foreig_foreign_trade_case Try viewing the attachment in native UI. When clicked on view, it will not open the attachment in $viewer.do, it opens in the below URL and downloads the attachment. https://<instance name>/sys_attachment.do?view=true&sys_id=<sys id of the attachment>When clicked on view, it should redirect to $viewer.do URL from sys_attachment URL Open the attachment record in sys_attachment table by filtering the table sys id. If a file name has a .pdf extension, check what is the content type.If the content type: application/octet-stream, then document viewer does support opening this PDF file.If the content type: application/pdf, this is opened in $viewer.do without any issue. To resolve this issue, you can change the content type of the affected pdfs to application/pdf, then it'll enable the document viewer to view the documents in browser. Alternatively, you can set up a before insert BR on sys_attachment to validate the content type of any attachment and change to required content type before insert. But it is also suggested to correct the content type from source of the document.Related LinksFor more information on Document viewer, refer the below documentation. Document Viewer