"Relevance Search brings a more Bing-like, global search experience to your mission critical business applications (think Dynamics 365) powered by Azure Search! "
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"Search within Documents in Dynamics 365: One of the best new capabilities of Relevance Search is that you can now search for text in a document stored in Dynamics 365! These include documents in a Note and Attachments on an Email or Appointment. We support several document formats, including Microsoft Office (Word documents, PowerPoint presentations, etc), PDFs, EML, HTML/XML, ZIP, and rich text format (RTF). "