Background: I am trying to create a single source of truth with our Excel documents that get passed through an approval process in SharePoint 2013. My users will mistakenly save files to their desktops and push the uncompleted file through the workflow, or disable macros and not receive my vba code to disable "save as." They also use features that are not supported in the Excel web app. Every other post states IRM can prevent people from saving a local copy, but I have IRM for SharePoint configured and can not find this feature.
Question: Is it possible to disable the "save as" feature so users can only save back to the SharePoint library? (using IRM, not vba or webapp) Is there a better way to implement a single source of truth in an Excel Doc?