Migration Project has been set up, the Active Directory part is working correctly. When switching to Exchange Data tab, user is presented with Open Project Wizard. All details are filled in the wizard, finish is clicked. Afterwards it is not possible to add source organizaition, corresponding menu item is greyed out.
The SQL database was not created successfully, possibly the user does not have enough rights on the SQL server specified in the wizard.
Use the credentials that have necessary administrative rights on the SQL server to be able to create QMM database, or install MSDE locally and use it to store the Migration Manager SQL database.