I just did a test migration of two global distribution groups between two forests. When I checked them after the migration, I noticed that they did not have an email address assigned to them. At what point in the process is this attribute copied over…if ever.
To throw a wrench at everything, the migration between the two forests als includes changing email addresses. For example, currently, users have an email address of [email protected]. Once in the new forest, they need to keep their old address and also have a new email address of [email protected]. Does this confuse the situation at all?