How to Seize FSMO Roles
Shifting a Flexible Single Master Operations (FSMO) role from one domain controller (DC) to another is normally done through a role transfer operation. But if the DC that holds an FSMO role experiences a serious failure that takes it out of service, you must instead seize its FSMO roles and reassign them to a functioning DC. For example, you need to seize an FSMO role if the current role holder: Important: After you seize an FSMO role from a DC, ensure that it is never reconnected to the network.