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At present, Immersive Reader in Azure does not support configuring a custom top-level domain such as "ir-companyname.com" because the service is designed to run on Azure's managed infrastructure, which uses the default domain *.cognitiveservices.azure.com. This restriction ensures the service benefits from Azure's security, scalability, and compliance features.
If your customers are facing issues due to firewalls or other network restrictions, the recommended solution is to allowlist the *.cognitiveservices.azure.com domain in their firewall settings. If the workaround does not resolve the issue, reaching out to Microsoft Support may provide additional guidance or custom solutions to address the problem.
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