Topology discovery failed, error 0x80040a02

topology discovery failed, error 0x80040a02

Topology Discovery failed, error 0x80040a02. For more information, click Explanation: This problem occurs. Here are some simple methods that can help you fix the 0x80040a02 topology detection failure issue. topology discovery failed 0x80040a02. MSExchange ADAccess 2114 Error: Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=1360). Topology discovery failed, error 0x80040a02.

Was and: Topology discovery failed, error 0x80040a02

C4430 ERROR C++
C00002la fatal system error
Roles Netlogon

Why did I get error 0x80040A02?

Windows Update continous fails to search for Updates or cannot install them. The source of this problem could be various things as

> Windows Registry
> Windows Filesystem
> Internet access

> Windows Update service
> File corruption
> Misconfiguration
> Adware
> Virus and Malware

How to fix Windows Update error 0x80040A02?

However, if you’re technically savvy, you can try the steps below:

1. Click Start and start typing topology discovery failed your keyboard for error 0x80040a02. In your search results "services.msc" should show up. Open it with a click.
3. A new windows will open containing all Windows services on your system.

4. Search for "Windows Update"
5. Right-click the "Windows Update" and then click Stop.

We will now clean the Windows Update temporary cache folder:

1. Hold your windows-key pressed and hit "R" key simultanous.
2. A small new windows will appear.
3. Type %windir%\SoftwareDistribution\DataStore in this new window and click OK.
4. This will open Windows Explorer on the correct location.
5. Delete all contents of this folder, topology discovery failed. (Hint: Use Ctrl + A to select all files and folders)

Now we will start the Windows Update Service again:

1. Switch back to the windows Services.
2. Locate Windows Update.
3. Right-click on it and choose Start.

If the problem still persists, you can run the System File Checker (SFC) utility. This handy in-built tool will check your filesystem.

1. Click Start and start typing on your keyboard for "cmd".
2. In your search results cmd should show up with an black icon.
3, error 0x80040a02. Right-click it and select Run as administrator.
4. If you are prompted for the admin password, enter the password and click OK.
5. A new completely black windwos will open. You can type commands directly into this topology discovery failed 6. Type sfc/scannow and press Enter.
7. This process will take a long time. You can minimize this black windows and work on.

Come back to the black window after a time and check if the process finished.
As soon as the SFC process finished, restart your computer, error 0x80040a02. After the restart you search for Updates again.

You are still facing the same issue?

1. Restart your computer.

Next thing is to clean Windows Update download path. These steps are only for expirienced user! If you mess up your computer with Regedit, you could loose your files! Take care or use a professional tool to investiagte your computer.
1. Hold your windows-key pressed and hit "R" key error 0x80040a02. A small new windows will appear.
3. Type regedit in this new windows and hit Enter.
4. In the new windows you have a navigation on the left side. Use it to navigate to error 1706 sql server install. Once you found it, search for WUServer and WIStatusServer in the right hand pane.
6. If they are not listet we cannot clean the download path. Othwerwise delete both.
7. Restart your computer.

Try to search for new Updates error 0x80040a02 are reported unc error wiki facing this issue? I think this is not an usual problem and your computer should be checked by professional.
Try to look for a solution here or search further in the search box below, error 0x80040a02.

Advanced information

The following Windows verisons are affected by this error:

> Windows Vista
> Windows 7
> Windows 8
> Windows 8.1
> Windows 10
> Windows 10 Redstone 2
> Windows 10 Creators Update
> Windows Server 2008 R2
> Windows Server 2012
> Windows Server 2016

GC capable


exchange 2007 sp2 on windows 2003 r2 sp2 with domain error 0x80040a02 windows 2008 and windows 2008 r2.

Exchange cluster resource can not bring online.  Event viewer shows error:

Microsoft Exchange Active Directory Topology Service

Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=3268). Topology discovery failed, error 0x80040a02 (DSC_E_NO_SUITABLE_CDC). Look up the Lightweight Directory Access Protocol (LDAP) error code specified in the event description. To do this, use Microsoft Knowledge Base article 218185, topology discovery failed, "Microsoft LDAP Error Codes." Use the information in that article to learn more about the cause and resolution to this error. Use the Ping or PathPing command-line error 0x80040a02 to test network connectivity to local domain controllers.

add exchange servers group to domain admins group, then restart all exchange servers.

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