You can use sp_addlinkedsrvlogin system sproc to create Linked server login mappings. See Establishing Security for Linked Servers in BOL for details. You can in the Enterprise Manager on the Security tab of a linked server properties.

>Hi,
>
>I defined a link server called PROD...
>
>And I have 2 logins...Login 1 and Login 2...
>
>I want that the Login 1 can use the linkserver but not the Login 2
>
>How can I do that ???
>
>Thank in advance.
>
>Dave
>Technologies Nter