Okta Privileged Access / Advanced Server Access: RDP Warning "Caution: Unknown remote connection"
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Overview
When connecting to Windows servers over Remote Desktop Protocol (RDP) using Okta Privileged Access (OPA) or Advanced Server Access (ASA), a new warning appears due to a Microsoft security patch. Resolve this issue by updating a specific Windows registry value to suppress the warning. The exact warning message is:
Caution: Unknown remote connection
Applies To
- Okta Privileged Access (OPA)
- Advanced Server Access (ASA)
- Remote Desktop Protocol (RDP)
- Okta Classic Engine
- Okta Identity Engine (OIE)
Cause
Microsoft added this warning through the April 2026 security patch.
Solution
How can the "Unknown remote connection" warning be suppressed?
A specific Remote Desktop Service registry value requires an update on the server to suppress the warning. Review the Microsoft article Understanding security warnings when opening Remote Desktop (RDP) files to understand the significance of the warning and see the "I'm an IT administrator. How do I temporarily revert the new security dialog?" section for the suppression method.
