Authentication Error: The Function Requested is Not Supported [FIX]

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Updated onOctober 4, 2023

updated onOctober 4, 2023

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ManyWindows 10users reported encountering an error message while trying to connect two computers throughRemote Desktop Connection.

The rrror messageAn Authentication Error Has Occurred the Function Requested is Not Supportedpops up leaving users hopeless.

This error seems to be caused by either a Windows patch issue or by some Oracle settings that need adjusting.

We were able to come up with a few solutions in order to help you fix this problem.

Steps to fix authentication errors: The function requested is not supported

Making sure that you have the latest updates guarantees that your system is working properly.

Try updating both the computers’ OS you want to connect.

In order to perform aWindows update, follow these steps:

Alternatively, you can download specific updates from the Microsoft Update Catalog website.

You may want to check out this guide, just in case you can’t install the latest updates.

Some users reported that modifying the Encryption Oracle Remediation policy using theGroup PolicyEditor helped them surpass this issue.

Follow the next steps in order to make the necessary adjustments:

Don’t have the Local Group Policy Editor on your PC? Here’s how to install it.

Alternatively, you can enable the Encryption Oracle Remediation through theRegistry Editor.

Attempting the change using theRegistry Editorhas the same effect, but is performed differently.

Some users find this method to be easier to perform.

In order to make modifications through theRegistryEditor, follow these steps:

We hope that you found at least one of our solutions helped you to fix this authentication issue.