Hi,
In my scenario we are using a gateway server(gen123.klm.com) for the domain klm.com.Action account is created as klm/user by using this action account we are pushing agent in klm.com domain.and we are  able to install the agents through the gateway situated in klm.com.
recently in my company we created another domain ptm.com both the ptm.com and klm.com are not trusted,my question if we make a trust between klm.com and ptm.com is it possible to install/push the agent in ptm.com domain by using the gateway server(gen123.klm.com) that is located in klm.com.
if it possible whether i need to create a separate action account for ptm.com domain  to push agent or the existing klm/user action account will work 

regards

angs

• Edited by angsangs 14 hours 21 minutes ago correcting

Couple of posts you might find useful here:

http://social.technet.microsoft.com/Forums/systemcenter/en-US/be77cbcc-620e-45ff-aeee-bee2ce2b6249/cannot-install-scom-agent-in-another-domain?forum=operationsmanagergeneral

http://social.technet.microsoft.com/Forums/systemcenter/en-US/3270d40e-37db-4877-bff6-4142b623ab8b/scom-agent-pushing-issues-in-different-domains-with-in-forest?forum=operationsmanagerdeployment

What is reported is that there must be a method for the agents to authenticate.

1. "This must be a forest trust (to support kerberos)."

2. Or you need a certificate.

Thanks Martin.