---
title: Unsupported password characters
description: There are password characters that are not supported. Users cannot use these characters, based on ServiceNow password complexity requirements.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/platform-security/authentication/unsupported-password-characters.html
release: brazil
product: Authentication
classification: authentication
topic_type: concept
last_updated: "2026-09-10"
reading_time_minutes: 1
breadcrumb: [Password complexity requirements, Local authentication, Authentication, Access Management]
---

# Unsupported password characters

There are password characters that are not supported. Users cannot use these characters, based on ServiceNow password complexity requirements.

To enable a secure network environment, users must use strong passwords that include a combination of letters, numbers, and symbols. These combinations help to prevent unauthorized users who usually use manual or automated methods to guess weak passwords.

-   The password policy requirements are based on the Basic Multilingual Plane \(BMP\) that contains characters for many languages. ServiceNow instance is shipped with BMPs of around 10000 characters.
-   Password characters within these permissible BMPs can be set for your instance. Password characters that do not adhere to these BMPs aren't allowed.

**Note:** User or company-specific characters that cannot be used in the password can be configured in the exclude password list.

For more information about the password policy properties, see [password policy properties](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/platform-security/authentication/password-policy-properties.md).