As you make configuration changes, other edit sesssions may exist in the domain that impact your edit session. If the existing changes are incompatible with yours, you will need to resolve the conflicts before you can activate your changes or you may decide to release the configuration lock and rollback your changes.
When incompatible configuration changes exist, the Activate Changes button in the Change Center becomes relabeled Resolve Conflicts.
You receive a warning that conflicting changes have been made in another edit session and see a description of those changes. Also, you are given a description of the changes to the domain that will occur if you initiate a resolve operation. For more information about other edit sessions, click Other Edit Sessions.