# PDF.JS Express not working in domain

**URL:** <https://pdfjs.community/t/pdf-js-express-not-working-in-domain/1327>\
**Category:** Technical Support\
**Created:** [January 25, 2022, 9:48am UTC](https://pdfjs.community/t/pdf-js-express-not-working-in-domain/1327 "2022-01-25T09:48:54Z")\
**Posts on this page:** 1\
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**Author:** ![user68](https://avatars.discourse-cdn.com/v4/letter/u/53a042/32.png) [@user68](https://pdfjs.community/u/user68)\
**Post date:** [January 25, 2022, 9:48am UTC](https://pdfjs.community/t/pdf-js-express-not-working-in-domain/1327/1 "2022-01-25T09:48:54Z")

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Hello,

I’m testing PDF.JS PdfTron Express viewer:

1. Build: “MS8xMy8yMDIyfDdhNmQwYmFhNQ==”
2. Core version: “8.2.0”
3. Full API: false
4. UI version: “8.2.0”
5. WebViewer Server: false
6. [[Prototype]]: Object

We are running the code as MVC - project on Windows IIS.  
With localhost - key it is working perfectly.  
In domain-operation PDF.Js Express refuses rendering due to invalid licence key which I got from your site.

Is there a more detailed documentation that describes the domain operation with PDF.JS PdfTron Express?  
Thanks for your support  
Christian Sonnweber  
[christian.sonnweber@gmail.com](mailto:christian.sonnweber@gmail.com)

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