---
title: "Discussion on \"AADSTS53003 Blocked by Conditional Access: A Read-First Sign-In Log Triage\" | Hashnode"
description: "Discussion on \"AADSTS53003 Blocked by Conditional Access: A Read-First Sign-In Log Triage\". What AADSTS53003 means, how to find the sign-in event and blocking policy, and five usual causes to check before adding an exclusion."
url: "https://hashnode.com/posts/aadsts53003-blocked-by-conditional-access-a-read-first-sign-in-log-triage/6acf2062a5fd817d61d9b282"
---

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# [AADSTS53003 Blocked by Conditional Access: A Read-First Sign-In Log Triage](https://adminpackstudio.hashnode.dev/aadsts53003-blocked-by-conditional-access-a-read-first-sign-in-log-triage?utm_source=hashnode&utm_medium=feed)

What AADSTS53003 means, how to find the sign-in event and blocking policy, and five usual causes to check before adding an exclusion.

Oct 14 · 10 min read · adminpackstudio.hashnode.dev  
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