login to domain account

[hshen]

I am working at home but need to login as domain account to make ADSI work. The problem is that VPN is connected only after I login (to local machine). How can I solve this dilemma? Or is there any way that I login to local machine account first, and then switch to domain account by supplying domain account credential?

Thanks

 

[cgervo]

Depending on your OS you may be able to select "Login using dial-up networking" when you first logon to your machine. This is also dependent on the VPN client you are using.

The other option is if you are prompted for a username and password when trying to access network resources you should be able to enter DomainName\username and your password and most likely will give you access.

 

[hshen]

Thanks for your help.
For the first solution, through "Login using dial-up", I only connect to ISP but cannot connect VPN.
To make the second option work, there must be a way to impersonate a domain user (by providing domain account name and password). But I don't know how to do it. I tried LogonUser() Win32 API, it does not work (error 1311, There are currently no logon servers available to service the logon request.).