Hi @TG-1. Thank you for your question. Today, our Support team and I convened to delve deeper into your query. I'm pleased to inform you that we have successfully provided you with a comprehensive explanation on the ticket you had raised with our team.

We believe that sharing this information could be valuable for our fellow community members. Therefore, we would like to provide a summary of our findings:

In recent years, industry security policies have evolved, leading to the discontinuation of support for loading a web page through an iFrame across different websites. To address this issue, significant server-side modifications are required for the application. However, these changes will give rise to significant security concerns and therefore we would not be able to action this. Consequently, we are initiating a thorough review and update of our documentation on this matter.

As a workaround - we would suggest having a direct link to the Document Retrieval Service rather than embedding it directly into your Sharepoint site.