In D365, when I run a custom SSRS report, the next/previous page and export buttons are all disabled, despite the report having multiple pages and the need for export to PDF. I do not think we have customized the report viewer code and I can't find any information online about this. Has anybody encountered this and how do I enable these buttons?
Turns out that you need to enable Report PDF viewer and related features in Feature management. Looks like they deprecated all export formats of SSRS report viewer.