Ok so at this point I need some help. I've created 3 domains. For the purpose of my explanation I will call the "Parent Domain (PD)", "Child Domain1 (CD1)" and "Child Domain2 (CD2)" and obviously one is a parent the others are child domains. The exchange server (enterprise edition) sits in the PD and is a member of that domain. I've created 2 CD's under that domain. So, I've created 2 mail stores (CD1 and CD2). Not sure if I should have created storage groups here or not. Created a user in CD1 and added an exchange account within the mail store for CD1 and given that account an email addy. I will de the same for users in CD2 aswell. I logged my machine on as that user into CD1 and tried to configure outlook. The name doesn't resolve. Now it seems to me that there's a problem with the user in CD1 seeing the GAL. I've checked that the account has read access to the storage group but my knowledge of exchange is limited. Am I doing this the wrong way? Will exchange support two domains like this? Thanks in advance for your help. Huw Send instant messages to your online friends http://uk.messenger.yahoo.com