Domain Migration Administrator 7.x
When migrating groups, open the Group Options tab, click on the Advanced button and move the bar to 'FAST'. At this setting, all group membership updates will be ignored. Or click on the 'Custom Level' option and deselect the 'Update local groups with members that have not been migrated ' and 'Add Windows NT 4.0 Global Groups to target local groups' checkboxes.
Please contact Technical Support to create a 'Support Request' for any issues you encounter that are not addressed by the User Guide, any Knowledge Base articles found on the website, or current Hotfixes available for download.