> For the complete documentation index, see [llms.txt](https://doc.sysdevmobile.com/mss-extensibility/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.sysdevmobile.com/mss-extensibility/mss-5.0/mss-extension-functions-mss-kalipso/synchronize/1200-synchronize-synchronize-module.md).

# 1200 - (Synchronize) Synchronize Module

1200 - (Synchronize) Synchronize Module

| Event   | Extension action set  | Description                                                   |
| ------- | --------------------- | ------------------------------------------------------------- |
| Before  | EXT\_1200\_1\_Before  | Will be executed before MSS opens the Synchronization module; |
| Replace | EXT\_1200\_2\_Replace | Will replace MSS Synchronization module;                      |
| After   | EXT\_1200\_3\_After   | Will be executed after closing the Synchronization module;    |

*Output Parameters (event replace):*

* outOpenMSSModule – Return code: 1 – Open MSS module / 0 – Don’t open MSS module;