Failure to scan inventory manually

Problem

You try to complete inventory scanning manually. However, this fails and you see either one of the following errors on the screen:

• Access Denied
• Scanning Timed Out

Note: While the resolution provided in this article will help you solve problems that you are facing while trying to complete inventory scanning manually, it could fail again due to various reasons. Therefore, it is recommended that you use the Scheduled Inventory Scanning feature, to complete this task.

Cause

Manual inventory scanning will fail due to either of the following reasons:

Access is denied

This could be due to the following reasons:

• Administrator credentials for a domain do not match or have been changed
• DCOM settings are disabled
• Force Guest feature is enable

Scanning times out

This could be due to the following reasons:

• Data is blocked by the firewall on the computer on which the Desktop Central server is installed
• Scanning fails on computers running in remote offices
• Multiple IP addresses have been enabled in the computer in which the Desktop Central server is installed
• UAC and Remote UAC are enabled in computers in a workgroup setup running on Microsoft Windows Vista or later versions

Resolution

You are required to follow the resolution related to the error message you saw on the screen while trying to complete inventory scanning manually:

Access Denied

• Check if the Administrator credentials for a domain that were specified while defining the Scope of Management (SoM) are valid and have not been changed.
• Enable DCOM settings in all the computers in your network. To enable DCOM settings, follow the steps given below:
  1. Click start>Run
  2. Enter dcomcnfg
  3. Click OK

     The dialog box that appears depends on the Windows operating system that is installed in your computer. If you are using Windows NT/2000, you will see the Distributed COM Configuration Properties dialog box on the screen. If you are using Windows XP, you will see the Component Services dialog box on the screen. To acces the Properties tab, follow the steps given below:

     1. Expand Component Services
     2. Expand Computers
     3. Right-click on My Computer
     4. Click Properties
  4. Click the Default Properties tab
  5. Select Enable Distributed COM on this computer
  6. Select an appropriate authentication level
  7. Select an appropriate impersonation level

  You have enabled DCOM settings in the computers in your network.

• Turn off the Force Guest feature if client computers are part of a workgroup (not part of a Windows Domain). Make the following change in all the client computers:
  1. Click start>Run
  2. Enter explorer
  3. Click OK
  4. Select Tools>Folder Options
  5. Click the View tab
  6. Deselect the option Use simple file sharing
  7. Click OK

Scanning Timed Out

• Unblock firewall ports: Ensure that the following ports are added to the exception list of the firewall in the computer in which the Desktop Central server is installed
  • 8020: Used for agent-server communication and to access the Web console
  • 8027: Used to complete on-demand tasks like inventory scanning, patch scanning, remote control, remote shutdown and moving agents from one remote office to another
• Ensure that computers are switched on and the Desktop Central service is running: If the scanning has failed for computers in remote offices, complete the following tasks:
  • Check whether the computers are switched on and running when the scanning is in progress
  • Ensure that the 'ManageEngine Desktop Central 7-Remote Control' is running in the client computers
• Eliminate issues that arise because of multiple IP addresses: When the computer, in which the Desktop Central server is installed, has multiple IP Addresses, like a virtual adapter or two NICs, disable the virtual Adapters
• Disable the UAC and Remote UAC in computers that have Microsoft Windows Vista or later versions installed: Follow the steps below to disable UAC:

  Note: This is applicable only if the computers are in a workgroup setup.

  Disabling UAC in the client computers

  You are required to disable the UAC feature in all client computers. To disable the UAC feature, follow the steps given below:

  1. Click start>Settings>Control Panel>User Accounts
  2. Disable the UAC settings

     For Windows 7 and Windows 2008 R2

     1. Click User Account Control Settings
     2. Drag and choose the control level to Never Notify
     3. Click OK

     For Windows Vista and Windows 2008

     1. Click Turn User Account Settings On or Off
     2. Uncheck the Use User Account Control (UAC) to protect your computer checkbox
     3. Click OK

  3. Close the Control Panel window.

  This will disable the UAC in the client computer. You need to perform the same steps in all the client computers that has Windows Vista or higher manually.

  Disabling Remote User Account Control in the client computers

  You are required to disable the Remote UAC feature by changing the registry entry that controls the Remote UAC feature. To disable the Remote UAC feature, follow the steps below:

  1. Click start>Run
  2. Enter regedit
  3. Click OK
  4. Navigate to HKEY_LOCAL_MACHINE \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\system
  5. Right-click on the white space and click New>DWORD Value
  6. Enter the name LocalAccountTokenFilterPolicy

     Note: If this key name is available then right-click on the name>Modify and follow the steps given below.

  7. Click Modify
  8. Change the value data to 1
  9. Click OK

  You have disabled the Remote UAC feature.

Applies to: Software Inventory Tracking, Hardware Inventory Tracking, Asset Management

Keywords: Track Software Inventory, Monitor Hardware Assets, Manual Scanning, Asset Scan, Inventory Reports

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