Office 2016 Outlook and Exchange Server, without Autodiscovery

Create a local XML redirect file:

<?xml version="1.0" encoding="utf-8" ?>
<Autodiscover xmlns="">
  <Response xmlns="">

Create registry key:


Name, with value: C:\Autodiscover\autodiscover.xml (path to xml file)

It only works if Outlook Anywhere and Outlook Web App has already been published to the Internet. And of course, you must replace URL with your own.

Windows SID/Name Translation

  • System will bind to EPM* (port 135) of the target domain controller
  • System will poll EPM for a dynamic port to connect into LSARpc(LDAT/LSAD)
  • System will call LSAT* LsarLookupSids3 for each SID, and receive the name associated with it

The End Point Mapper (EPM) points clients to a dynamic RPC port that a service is listening on. LSAT is a protocol that allows clients to translate security identifiers (SIDs) into human readable names and vice-versa.