Hello Hannelen Leirvåg,
Welcome to the Microsoft Q&A and thank you for posting your questions here.
I understand that you are in need of a resource to implement ADF SSIS Integration Runtime setup.
Regarding your request, you can find the updated information on configuring a virtual network for Azure-SSIS integration runtime or setting up custom DNS on Azure SSIS integration runtime in ADF here: https://video2.skills-academy.com/en-us/azure/data-factory/azure-ssis-integration-runtime-virtual-network-configuration
Secondly, you can download the custom setup script (main.cmd) and its associated file (setupdnsserver.ps1) from the GitHub repository: https://github.com/MicrosoftDocs/azure-docs/blob/main/articles/data-factory/azure-ssis-integration-runtime-express-virtual-network-injection.md
Thirdly, for resources on ADF SSIS Integration Runtime setup issues and custom DNS, refer to the following link:
I hope this is helpful! Do not hesitate to let me know if you have any other questions.
Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful.