How to Mail-Enable a Distribution Group using exchange2007 powershell cmdlet "Enable-DistributionGroup"residing in different domain from the one in which i have logged in. However both the domains are in the same forest. Kindly help me as soon as possible.

You must do a "prepare domain" in all your AD domains that will contain something related to Exchange.

Thanks for your response on this. Actually i want to know that is there any wayby which ican pass credential of any domain to "Enable-DistributionGroup" cmdlet to mail enabled the group residing in the domain whose credential i am passing. For Example, Actuallywe have Two domains i.e., DomainA and DomainB both of them are in the same forest. Now i logged into DomainA and i want to mail enabled a distribution group residing in DomainB using exchange powershell cmdlet. Is there anyway i can do it using exchange powershell cmdlet? thanks Muneeb

Exchange 2007 setup creates some groups that is alse delegated permission. these groups are located in "Microsoft Exchange Security Groups" OU you can use "runas". and run EMC/EMS with an account that has permission. you can also delegate permission in Exchange to adminaccount in both domains. in EMC, click on Organization configuration, in the middle pane you should see who has administrative permission in Exchange 2007.