Tag Archives: patch

Fix: RDP error The function requested is not supported

When trying to connect to a server or machine via Remote Desktop Connection you will get the below error which is strange as one would normally connect without any issues.

"Remote Desktop Connection
An authentication error has occurred.
The function requested is not supported
Remote computer: XXX.XXX.XXX.XXX"

After some research I found that this is due to a Windows Update patch which was released recently that is CVE-2018-0886 for RDP. So if the workstation was updated and the server was not yet.

There are two options for this.

Patch the server with the CVE-2018-0886 (Recommended)

Update the policy on the local computer (Not recommended but in case of emergency)

  • On the computer open Group Policy
  • Go to Computer Configuration > Administrative Templates > System > Credentials Delegation
  • Change Encryption Oracle to Remedition to Enabled
  • Change Protection Level to Vulnerable

Open MSTSC and you will be able to connect to the server.

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Fix: Outlook blocked access to the following potentially unsafe attachments

When you open a specific attachment in Outlook you might get the error saying Outlook blocked access to the following potentially unsafe attachments. Here’s a some solutions to help you unblock attachments in Outlook

Make sure that Outlook is closed. Open Registry and go to the below area depending on your office application version

Microsoft Office Outlook 2010
HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security
Microsoft Office Outlook 2007
HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security
Microsoft Office Outlook 2003
HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Security
Microsoft Outlook 2002
HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Outlook\Security
Microsoft Outlook 2000
HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Outlook\Security

Create a new String Value and enter Level1Remove
As the value enter the extension of the file example .pptx, if you want to add multiple extensions, seperate them with a semicolon like this, .pptx;.docx

Close regedit and open Outlook

If this doesn’t work then you might have an update that blocks as Microsoft have released a patch which blocks safe files.

If you do have the below updates according to the Office version, remove them.

Outlook 2007: KB3191898
Outlook 2010: KB3203467
Outlook 2013: KB3191938
Outlook 2016: KB3191932

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