The Select Collections page lets you not only choose the collections you'd like to migrate but also view collection migration status.
As Figure 13 shows, the page lists all the collections and specifies whether they've been migrated, whether they contain devices or users, and whether any collections are blocked from migration. For this example, I selected the Windows 7 Clients collection
and its subcollections for migration.
ref: http://windowsitpro.com/configuration-manager/migrating-sccm-2007-sccm-2012
Edoardo Benussi
Microsoft MVP - Directory Services
edo[at]mvps[dot]org
