add virtualbox guest to network domain

I have done this on a linux host and windows 7 guest.  The requirement was to put the windows 7 guest to office network.

1. create a bridged adapter for the guest, using virtualbox settings window.

2.  This will create an adapter on the guest that will have the IP picked from ntework domain in which your host exists. That means The IP will be looking similar to the host IP, that can be pinged from a different PC.

3. Now, go to your guest OS, Start-> My computer-> right click -> Properties

4. Click on 'change settings' that you see on the right bottom side. you will get below window.

5. Click on 'Change' button in the above window. (see 'To rename this computer or domain...'). you will get below window.

6. You will see 'Workgroup' enabled. Change it to 'Domain'(see under 'Member of'). Add your domain name here and click okay. This will make the OS to contact DNS server and register itself . Here on you will be able to login to domainname/username in your Guest OS.