Provided that all your trusts are functioning and set up correctly it should not be a problem.
To allow authentication to a different domain you will need to add an extra Active Directory connection string to your K2Server.config file and your K2Studio.config file.
K2Server.config
<K2Server>
<DataSources>
<DataSource Path="LDAP://DC=geo,DC=corp,DC=int" NetBiosName="GEO" Type="ActiveDirectory" />
<DataSource Path="LDAP://DC=aag,DC=corp,DC=int" NetBiosName="AAG" Type="ActiveDirectory" />
</DataSources>
K2Studio.config
<K2Studio>
<DestinationRule>
<DataSources>
<DataSource Path="LDAP://DC=geo,DC=corp,DC=int" NetBiosName="GEO" Type="ActiveDirectory" />
<DataSource Path="LDAP://DC=aag,DC=corp,DC=int" NetBiosName="AAG" Type="ActiveDirectory" />
</DataSources>
Hope this helps!
JohanL
