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License Manager is free, open-source software managing Windows and Office licenses of local or remote computers. It also integrates Volume License Management Client Service for testing the KMS server and open a local KMS server.
| Contributor | Description |
|---|---|
| Hotbird64 | Original developer of License Manager |
| Nang | Contributor of License Manager database |
| shiroinekotfs | Contributor License Manager |
| anhvlt-2k6 | Contributor License Manager |
When first open up the License Manager, you will see a window like this.
License Manager Main Window
- License Manager sub-tools.
- Basic information about your computers, such as Computer Name, user name that is currently connecting, and currently selected product
- Your license information, including the SKU ID, Application ID, Phone Installation ID and Extended Product ID.
- Your machine information
- The status bar
To connect and managing license of external computers (such as Windows Server Core), you can go to File > Connect to Another Computer.
A small dialog will display to prompt for the target computer. You can go enter the computer name, an IP address, or the FQDN; and if there is any credential changes recently, tick the checkbox Change Credentials.
Connect to Another Computer dialog
⚠️ It is recommended that, if you are signed-in with the administrator account of the local Active Directory, and want to connect to a server, you should leave the checkbox Change Credentials empty.
When a new database is released though the community, you don't have to download a whole new version of License Manager. Go to File > Load Custom KMS Database
To install a Generic Key the Key > Check or install a Generic Key or on the top bar Install a Generic Key. It will appear a new dialog that show a list of product keys available in the License Manager key database.
Install a Generic Key dialog
In the dialog, there are 3 main type of keys
- Store license keys - mostly are retail or KMS Host keys
- User-generated GVLKs are unverified by Microsoft, therefore the ability to activate using KMS host is unknown.
- Genuine GVLKs are the Microsoft's published product keys on Microsoft Learn
Once you select the right product key for your license, click on the Check button. It will show the detailed version of your key, including Product Key Applies for, Product Name, SKU ID, Edition, License (Type), and other information.
Check the Product Key
You can either click Check Online (to check if the MAK can be activated with Microsoft service) or Install Key into the system.
⚠️ NoteThe Generic Key (GLVK) are designed to be activated with local KMS host, not with the online Microsoft server. You can may an error of "This is not an EPID that has multiple online activations"
If applicable, License Manager will (automatically) decide which keys are available to be installed in your system.
⚠️ NoteYou can install multiple licenses for Office, but not Windows.
Install multiple GLVK
You can see some product keys embed in your system by OEM in Key > Show your current System Keys
View system keys
Once you have installed your product key, you can activate by click the Activate button or Product > Activate
⚠️ NoteIf you have installed a Generic Volume Key, please configure your target activation server.
- If your computer is in a Active Directory domain, and has a KMS host available, please configure the Detected KMS Domain, otherwise configure the Override KMS Host data with the server and its port.
- If you are the Active Directory administrator, your domain has a KMS host, and you want to configure automatically detection service (mostly for load balancing), read how to configure the DNS server of your domain
You can also configure this setting globally. Please read in Configure Windows Software Protection Service (For advanced users)
⚠️ NoteIf you want to purge the current license status, this feature will not help. Please see in reloading the licenses
To uninstall a license, select the current license of the drop bar, then select the Uninstall Product Key in Product
⚠️ NoteUse this method when you want to install a product key that does not exist in the License Manager database, by click the Install Key button after you verify the key.
To view detail information about the EPID, SKU, or Product Key, select Product > Product Finder/Key Checker or Product Finder
⚠️ NoteThis feature only can get the local IID and EPID. If you want to use the get the external ID, please use the Manual
Get Confirmation ID Online
To get the confirmation without calling the Microsoft dispatch service, go to Product > Get Confirmation ID or Product > Get Confirmation ID (Manual). Make sure the computer that send the request is CONNECTED to the Internet. Otherwise it will not send/get request to the service.
After get the Confirmation ID, you can either ether use slui 4 or slmgr /atp <Your Confirmation ID>
Configure Windows Software Protection Service
Configure Windows Software Protection Service may help you in case of
- The service is irresponsible with the changes apply into (e.g. after upgrade from Home to Pro): Service > Reload or Service > Restart
- The service need to be purged all licenses because of any reasons: Service > Rearm
- Start and Stop the service: Service > Start or Service > Stop
- Installing new license for Windows: File > Install License Files
By default, the KMS Host Statistics will be shown, even you are not configured the KMS host. You can turn off this in View > Show Invalid, Unsupported and Empty Fields
⚠️ Note
- If your computer is in a Active Directory domain, and has a KMS host available, please configure the Detected KMS Domain, otherwise configure the Override KMS Host data with the server and its port.
- If you are the Active Directory administrator, your domain has a KMS host, and you want to configure automatically detection service (mostly for load balancing), read how to configure the DNS server of your domain
In License Manager, external extension is the libkms32 (for License Manager 32-bit) or libkms64 (for License Manager 64-bit). It allows hosting a local KMS server, or testing a KMS Server.
You can obtain the libkms in the Volume License Management Service binaries or build it by yourself from source
Hosting a KMS Server using License Manager and libkms
Testing a KMS Host using License Manager and libkms
In Export SKU and KMS IDs or Tools > Export SKU and KMS IDs, you can export the database for various applications, such as Volume License Management Service (in .kmd or the internal database in C programming language), py-kms, or other License Manager applications.
| Export format | File extension | Description |
|---|---|---|
| VLMCSD | .kmd |
This format used by vlmcsd, as the external (add-on) database |
| py-kms classic | .txt |
This format used by py-kms (KMS for Python 2) |
| Generic C/C++/C# |
.txt, .c, .cpp, .h, .hpp, .cs
|
This format helps developers to modify the vlmcsd source code |
| License Manager database, py-kms | .xml |
This format used by License Manager |
Depends in your case, you can select Options for encoding or readability.
Export database
| Error code | Error message | Activation type |
|---|---|---|
| 0x8007000D | The KMS host you are using cannot handle your product. It only supports legacy versions. | KMS client |
| 0x8004FE21 | This computer is not running genuine Windows. | MAK/KMS client |
| 0x80070005 | Access denied. The requested action requires elevated privileges. | MAK/KMS client/KMS host |
| 0x8007007b | DNS name does not exist. | KMS client |
| 0x80070490 | The product key you entered didn't work. Check the product key and try again, or enter a different one. | MAK |
| 0x800706BA | The RPC server is unavailable. | KMS client |
| 0x8007232A | DNS server failure. | KMS host |
| 0x8007232B | DNS name does not exist. | KMS client |
| 0x8007251D | No records found for DNS query. | KMS client |
| 0x80092328 | DNS name does not exist. | KMS client |
| 0xC004B100 | The activation server determined that the computer could not be activated. | MAK |
| 0xC004C001 | The activation server determined the specified product key is invalid | MAK |
| 0xC004C003 | The activation server determined the specified product key is blocked | MAK |
| 0xC004C008 | The activation server determined that the specified product key could not be used. | KMS |
| 0xC004C020 | The activation server reported that the Multiple Activation Key has exceeded its limit. | MAK |
| 0xC004C021 | The activation server reported that the Multiple Activation Key extension limit has been exceeded. | MAK |
| 0xC004F009 | The Software Protection Service reported that the grace period expired. | MAK |
| 0xC004F00F | The Software Licensing Server reported that the hardware ID binding is beyond level of tolerance. | MAK/KMS client/KMS host |
| 0xC004F014 | The Software Protection Service reported that the product key is not available | MAK/KMS client |
| 0xC004F02C | The Software Protection Service reported that the format for the offline activation data is incorrect. | MAK/KMS client |
| 0xC004F035 | The Software Protection Service reported that the computer could not be activated with a Volume license product key. | KMS client/KMS host |
| 0xC004F038 | The Software Protection Service reported that the computer could not be activated. The count reported by your Key Management Service (KMS) is insufficient. Please contact your system administrator. | KMS client |
| 0xC004F039 | The Software Protection Service reported that the computer could not be activated. The Key Management Service (KMS) is not enabled. | KMS client |
| 0xC004F041 | The Software Protection Service determined that the Key Management Server (KMS) is not activated. KMS needs to be activated. | KMS client |
| 0xC004F042 | The Software Protection Service determined that the specified Key Management Service (KMS) cannot be used. | KMS client |
| 0xC004F050 | The Software Protection Service reported that the product key is invalid. | MAK/KMS/KMS client |
| 0xC004F051 | The Software Protection Service reported that the product key is blocked. | MAK/KMS |
| 0xC004F064 | The Software Protection Service reported that the non-genuine grace period expired. | MAK |
| 0xC004F065 | The Software Protection Service reported that the application is running within the valid non-genuine period. | MAK/KMS client |
| 0xC004F06C | The Software Protection Service reported that the computer could not be activated. The Key Management Service (KMS) determined that the request timestamp is invalid. | KMS client |
| 0xC004F074 | The Software Protection Service reported that the computer could not be activated. No Key Management Service (KMS) could be contacted. Please see the Application Event Log for additional information. | KMS client |