>Hi,
>
>I am getting this message:
>
>System.Data.SqlClient.SqlException (0x80131904): A connection was successfully established with the server, but then an error occurred during the login process. (provider: SSL Provider, error: 0 - The token supplied to the function is invalid)
>
>when trying to connect to a remote database server using SSMS.
>
>I am able to connect to the server from other PCs without a problem.
>
>Any ideas what could be causing this?

Found your message on SQL Central :)

And a few others such as

http://social.msdn.microsoft.com/Forums/sqlserver/en-US/c84ae5d6-7be4-4238-be8a-9982f6aa4c2c/a-connection-was-successfully-established-with-the-server-but-then-an-error-occurred-during-the?forum=sqldataaccess

I sent message to forum's team to correct the dead links in that thread, but in the meantime you may try resetting IIS.