Convert mail contacts to Mail users

Hi all,

I have a forest with 3 sub-domains. Exchange is on the root forest and 2 of the sub-domains do not use exchange for email (they have another email system).

We are trying to create dynamic distribution lists for the sub-domain where the selection field will be "Office".

For all the users that are not on the root domain, we have created a mail contact so we have them on the GAL. However, we now need these users to become Mail users rather than Mail contact users. Is there an easy way to achieve this?

Best regards,

R.