Spring Boot 3迁移后Active Directory集成报InvalidNameException问题求助

将基于Spring Boot 2.1的旧代码迁移至Spring Boot 3.0.8，其中包含Active Directory（AD）集成模块。原Spring Boot 2.1中的AD代码运行正常，但迁移完成后出现错误：org.springframework.ldap.InvalidNameException: [LDAP: error code 34 - invalid DN]，且AD端未做任何改动。

旧代码（Spring Boot 2.1） #

@Autowired
public void configure(AuthenticationManagerBuilder auth) throws Exception {

    ActiveDirectoryLdapAuthenticationProvider adProvider = new ActiveDirectoryLdapAuthenticationProvider(domain,
            ldapUrls, ldapBaseDn);
    adProvider.setConvertSubErrorCodesToExceptions(true);
    adProvider.setUseAuthenticationRequestCredentials(true);

    if (ldapUserDnPattern != null && ldapUserDnPattern.trim().length() > 0) {
        adProvider.setSearchFilter("(&(objectClass=user)(sAMAccountName={1}))");
        // adProvider.setSearchFilter(ldapUserDnPattern);
    }

    auth.authenticationProvider(adProvider);
    auth.eraseCredentials(false);

}

新代码（Spring Boot 3.0.8） #

@Bean
public AuthenticationManager authManager(HttpSecurity http) throws Exception {
    ActiveDirectoryLdapAuthenticationProvider adProvider =
            new ActiveDirectoryLdapAuthenticationProvider(domain, ldapUrls,ldapBaseDn);
    

    adProvider.setConvertSubErrorCodesToExceptions(true);
    adProvider.setUseAuthenticationRequestCredentials(true);
    adProvider.setSearchFilter("(&(objectClass=user)(sAMAccountName={1}))");

    AuthenticationManagerBuilder authenticationManagerBuilder =
            http.getSharedObject(AuthenticationManagerBuilder.class);
    authenticationManagerBuilder.authenticationProvider(adProvider);
    return authenticationManagerBuilder.build();
}

已通过Apache Directory Studio验证domain、ldapUrls和ldapBaseDn配置正确，但因公司政策无法提供具体值，尝试多种解决方案均无效。

内容的提问来源于stack exchange，提问作者Praguru 14