---
title: Authentication Providers
slug: how-tos/tMrv-authentication-providers
docTags: 
createdAt: 2025-09-08T11:41:22.978Z
---

How to authenticate Historian users against an external identity provider.

1. [Microsoft Entra ID](docId\:Nr4AIWAwD_osjewKAyYtj)
2. [Google OAuth](docId\:cTUFDJnYIf0mM0YmHBu04)
3. [LDAP](docId\:mQELnBfgpWDawlZmmdPtt)