Step1:The first time K2.net Studio starts and a Destination Rule is specified after an SP1 install, it will automatically determine the current domain context in which it is started and create an entry in the K2Studio.Config file which should look like this(depends on the environment):
<DataSources>
<DataSource Path="LDAP://DC=Domain,DC=com" NetBiosName="MyNetBiosName" />
</DataSources>
To add a new datasource, copy the above datasource node and paste it below the first one(As shown below).
<DataSources>
<DataSource Path="LDAP://DC=Domain,DC=com" NetBiosName="MyNetBiosName" />
<DataSource Path="LDAP://DC=Domain1,DC=com" NetBiosName="MyNetBiosName1" />
</DataSources>
Make the necessary changes to the Path and NetBiosName attributes.
Close and save the K2Studio.Config file.
Step3:Close and Reopen K2.net Studio. You should now be able to contact multiple domains according to the updated information in the K2.net Studio.Config file.