Access SQL Server in ODBC in different domain

Hi,

Recently, in my company, we added a new domain with sql servers. Ofcourse, a trust was setup between existing and new domain.
There was a need to access these sql servers from prev domain.
The way you access it would be as:

<sqlservername>.domainName\instanceName

Example: If sqlserver name is: DevServer 
and domain is: company.internal.com 
and instance name is: PostTesting

Then I will access it as: devserver.company.internal.com\posttesting

For default instance, it would be just: devserver.company.internal.com

HTH