Outlook add-on error: "Requested registry access is not allowed"

Question

I found this code on Stackoverflow and used it in a Outlook 2010 add-in and for some reason I still get

"Requested registry access is not allowed."

I am trying to change a value in a DWORD key.

var admin = WindowsIdentity.GetCurrent().Name;
            RegistryKey LocalMachine = Registry.LocalMachine;
            RegistryKey rk = LocalMachine.OpenSubKey(sSubKey, RegistryKeyPermissionCheck.ReadWriteSubTree, RegistryRights.ChangePermissions | RegistryRights.ReadKey);//Get the registry key desired with ChangePermissions Rights.
           if (rk == null)
            {
                System.Windows.Forms.MessageBox.Show("No RegKey");
            }
            RegistrySecurity rs = new RegistrySecurity();
            rs.AddAccessRule(new RegistryAccessRule(admin, RegistryRights.FullControl, InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit, PropagationFlags.InheritOnly, AccessControlType.Allow));//Create access rule giving full control to the Administrator user.
            rk.SetAccessControl(rs); //Apply the new access rule to this Registry Key.
            rk = Registry.LocalMachine.OpenSubKey(sKSubKey, Microsoft.Win32.RegistryKeyPermissionCheck.ReadWriteSubTree, RegistryRights.FullControl); // Opens the key again with full control.
            rs.SetOwner(new NTAccount(admin));// Set the securitys owner to be Administrator
            rk.SetAccessControl(rs);// Set the key with 

            Registry.SetValue(sSubKey, sKey, sValue, RegistryValueKind.DWord);

score 1 · Answer 1 · answered Apr 22 '15 at 06:24

1

You can modify the HKLM hive only if your code is running as a local admin and UAC is either off or your app had been grated elevated privileges.

answered Apr 22 '15 at 06:24

Dmitry Streblechenko

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I am local admin. Is there a way to run and outlook add-on with admin privileges without start outlook as "run as administrator"? – Ren-Heok Apr 22 '15 at 15:18
No, the privileges are granted on the per-process basis, so your addin will use outlook.exe process privileges. – Dmitry Streblechenko Apr 22 '15 at 16:58

score 0 · Answer 2 · edited May 23 '17 at 12:14

0

You can't write to the HKLM hive in newer versions of Windows (starting from Vista) unless you have administrative privileges. Take a look at the similar threads for more information:

edited May 23 '17 at 12:14

Community

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answered Apr 22 '15 at 09:57

Eugene Astafiev

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This has nothing to do with Windows Vista. The same limitation applied back in the Windows NT 3.51 days. – Dmitry Streblechenko Apr 22 '15 at 17:04

Outlook add-on error: "Requested registry access is not allowed"

2 Answers2