What is LAN(License Activation Number) & what is its use ?

This forum is related to the Microsoft System Center Service Manager.

Where or in what context dd you find the name "LAN (License Activation Number)"?

If your question is not related to the Microsoft System Center Service Manager, you should post your question in the appropriate forum.

Hi,

Do you mean License key to Active Product or Windows operating system?

Regarding to License, you may check below link:

http://www.microsoft.com/licensing/activation/existing-customers/product-activation.aspx

Regards,

Yan Li