Can I preview the excel documents in the document viewer field
Discussion posts and replies are publicly visible
No
No you cannot. You can use it to view PDF documents
No. If you are using SSO, you can put a file on the content management/document management system(ex. SharePoint, etc.) and create a safe link in Appian.
Since nobody mentioned it yet, No.
There's a paid plug-in that can basically do it - it was originally branded "PDFTron" (it can display PDFs, word docs, excel docs if i'm remembering correctly, and some others), but its name has changed to something else that I don't remember.
Yes, there are a couple of plug-ins. However, as per my knowledge, all of them required some licensing. Please let us know if there are any plugins that we can use without a license.
You're right - that's what i meant by "paid plug-in" initially. The one I'm referring to, though, can be tried for free (the functionality is available but documents display with watermarks or something similar). If it were drastically needed funcitonality for a project, I could see the licensing fee being worth it.
If you use Sharepoint, you could try embedding the Sharepoint preview link in a Web Content Field.
No, not possible as of now