Software⏱️ 4 min read📅 2026-06-19

How to Fix: Cannot enable shared access. Error: 87 the parameter is incorrect

Error 87 occurs when enabling shared access on a VPN connection in Windows 10.

Quick Answer: Check the VPN settings and ensure that split tunneling is enabled, then try again.

📋 Table of Contents

  1. ⚠️ Common Causes
  2. 🔧 Proven Troubleshooting Steps
  3. 💡 Conclusion

The 'Cannot enable shared access. Error 87: the parameter is incorrect' error occurs when attempting to set up a VPN connection in Windows 10 that connects to an Active Directory domain. This issue affects users who want to join their Windows 10 device to an existing domain using a VPN connection, as described in various tutorials and guides.

This error can be frustrating for IT administrators and users alike, especially when trying to connect to a domain through a VPN connection. In this troubleshooting guide, we will walk you through the steps to resolve this issue.

⚠️ Common Causes

  • The primary reason for this error is that the 'Allow other people to use this connection' checkbox is not enabled in the Windows Settings. This option needs to be checked to allow the VPN connection to be shared with domain accounts.
  • Another possible cause of this error could be related to the network settings or the VPN configuration itself, but enabling the 'Allow other people to use this connection' checkbox should resolve the issue.

🔧 Proven Troubleshooting Steps

Enabling the 'Allow other people to use this connection' checkbox

  1. Step 1: Open the Windows Settings app by pressing the Windows key + I on your keyboard or searching for 'Settings' in the Start menu.
  2. Step 2: Click on 'Network & Internet', then select 'VPN'.
  3. Step 3: Look for the VPN connection that you want to enable shared access for and click on it.
  4. Step 4: Scroll down to the 'Advanced options' section and toggle the switch next to 'Allow other people to use this connection' to the right (green).
  5. Step 5: Click 'Save changes' to apply the changes.

Checking network settings or VPN configuration

  1. Step 1: Check the Windows Event Viewer for any errors related to the VPN connection. You can do this by searching for 'Event Viewer' in the Start menu and opening it.
  2. Step 2: Look for any error messages that may indicate a problem with the VPN connection, such as 'Error 87: the parameter is incorrect'.
  3. Step 3: Check the network settings on your device to ensure that the VPN connection is configured correctly. You can do this by searching for 'Network & Sharing Center' in the Start menu and opening it.
  4. Step 4: Verify that the VPN server is configured to allow shared access and that the domain account has the necessary permissions.

💡 Conclusion

By enabling the 'Allow other people to use this connection' checkbox or checking your network settings and VPN configuration, you should be able to resolve the 'Cannot enable shared access. Error 87: the parameter is incorrect' error and successfully connect to your Active Directory domain through a VPN connection.

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