If I try to add external users other than my domain I am getting an error "you are not allowed to add external user". I could not find any settings in central admin. There are settings instruction for SharePoint online or office365 available on the web. Kindly help on this. enter image description here

  • What is your Farm type its on premises or Online – SURYAKANT DAS Apr 18 '18 at 13:24
  • on premises. Sharepoint server 2013 enterprise – Chetan Apr 18 '18 at 15:39

SharePoint On-premises doesn’t have feature to share sites with external users by default.

We need to extend the web application and implement identity providers such as ADFS.

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