> For the complete documentation index, see [llms.txt](https://tldocs.gitbook.io/documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tldocs.gitbook.io/documentation/getting-started/readme.md).

# TimeLine E3 Documentation

You'll find useful documentation for working with the TimeLine Framework, TimeLine Developer & TimeLine WEB as well as best practices / coding conventions.

{% hint style="warning" %}
Using Microsoft 365 / Exchange Online? Microsoft shuts down EWS in October 2026. See [E-Mail Sync: EWS to Graph API](/documentation/migrations/ews-to-graph-api.md) for the migration guide and deadlines.
{% endhint %}

## Browse the documentation

<table data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><i class="fa-code">:code:</i></td><td><strong>Development</strong></td><td>The TimeLine Framework, server-side customization, and TimeLine Developer (TLD).</td><td><a href="/pages/-MgPYlQVNmcJOw_jgttD">/pages/-MgPYlQVNmcJOw_jgttD</a></td></tr><tr><td><i class="fa-sliders">:sliders:</i></td><td><strong>Configuration</strong></td><td>Server and client configuration, timeouts, and troubleshooting the E3 Bridge.</td><td><a href="/pages/FiNVGhsg4L486ZnSKrzn">/pages/FiNVGhsg4L486ZnSKrzn</a></td></tr><tr><td><i class="fa-shield-halved">:shield-halved:</i></td><td><strong>Security</strong></td><td>Setting up the Stunnel proxy and certificates for secure client connections.</td><td><a href="/pages/-MkkrWTNscHbEfAQsviA">/pages/-MkkrWTNscHbEfAQsviA</a></td></tr><tr><td><i class="fa-arrow-right-arrow-left">:arrow-right-arrow-left:</i></td><td><strong>Migrations</strong></td><td>ASA to PostgreSQL (V17) and the e-mail sync migration from EWS to the Graph API.</td><td><a href="/pages/Bz4iN0rEZqznNdKtm4Ab">/pages/Bz4iN0rEZqznNdKtm4Ab</a></td></tr></tbody></table>