> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vortexiq.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Failed Logins (24h), Microsoft SQL Server KPI card, Vortex IQ Nerve Centre

> Logins Failed/sec counter or error log scrape (msg 18456). Bursts = brute force or stale app credentials.

**[Nerve Centre KPIs](/nerve-centre/kpi-cards/mssql) · [Audit Profile](/nerve-centre/kpi-cards/mssql/audit) · [Sentiment Settings](/nerve-centre/kpi-cards/mssql/sentiment)**

## At a glance

* **Category:** Errors
* **Type:** Supporting Metrics
* **Chart:** kpi
* **Format:** number
* **Time window:** 24h
* **Alert trigger:** >100

## Calculation

Logins Failed/sec counter or error log scrape (msg 18456). Bursts = brute force or stale app credentials.

## Known limitations

*Known limitations, FAQs, or reconciliation notes specific to this card. Replace this block when authored.*