Add non-AD Domain

Question

We have exchange setup for our AD domain. We have some non-AD domains that we need to accept mail on using exchange 2013. How do i set this up in exchange 2013?
I have added these domains in accepted domains but when i try to add users, i can only select from the AD domain.

Answer 1

If you want to add users from different domain to the exchange server then you need to create trust between those domain.
If you want have email address of non-domain user then create email address policy and add the accepted domain that you have created.
This will fulfil of stamping of exchange smtp address for the user account.
But if you want a mailbox for those non -domain (e.g user located in novel or linux) then you need to manually import the user list to the Active Directory console then you add them in Exchange server for mailbox created.
If you want to have the only the UPN suffix name of non domain then add the addtional upn suffix in the active directory console.
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