# Cal.com v5.6.17 — Release & Upgrade Intelligence
- **Product:** Cal.com (https://cal.com)
- **Version:** v5.6.17
- **Released:** Sep 10, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/calcom/updates/v5.6.17/

## Executive Summary (TL;DR)
Cal.com v5.6.17. Source highlight: fix: delegated credentials timezone outlook

## New Features
- chore(apps/web): add Scan for React performance issues and eliminate slow renders in web app
- feat: add PBAC permission checks to insights
- feat: add `customReplyToEmail` for EventTypeSettings atom
- feat: update translations via @LingoDotDev
- docs: add knowledge base against unnecessary Day.js usage
- feat: support auto create agent

## Improvements
- perf: move to disable prisma client extension inference

## Bug Fixes
- fix: delegated credentials timezone outlook
- fix: duplicate event created in attendee calendar due to incorrect icalUid
- fix: Prevent loading of dashboard GTM container on booking success page
- fix: v2 hidden event types
- fix: org layout authentication
- fix: Zoom being set to UTC (wrong time) after creating a meeting