# Page Not Found

The URL `2.21/start/upgrade/tobe/inapp` does not exist.

You might be looking for one of these pages:
- [Upgrade to Business Edition from within Portainer Community Edition](https://docs.portainer.io/start/upgrade/tobe/inapp.md)
- [Docker Swarm](https://docs.portainer.io/start/upgrade/tobe/swarm.md)
- [Docker Standalone](https://docs.portainer.io/start/upgrade/tobe/docker.md)
- [Upgrading Agent-only deployments](https://docs.portainer.io/start/upgrade/tobe/agent.md)
- [Switching to Portainer Business Edition](https://docs.portainer.io/start/upgrade/tobe.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://docs.portainer.io/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://docs.portainer.io/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/start/upgrade/tobe/inapp.md`)
- Use `Accept: text/markdown` header for content negotiation