Final answer:
To track notifications and servicing activities for primary loan servicing, an authorized agency official would use an electronic system like eDALR$ or other efficient loan servicing management systems.
Step-by-step explanation:
The authorized agency official must track notifications and servicing activities for borrowers whose accounts are being processed for primary loan servicing by use of an electronic system such as eDALR$ (Electronic Default Automated Loan Recollection System) or a similar system designed to manage loan servicing efficiently. These systems are essential for maintaining accurate records of loan servicing actions, from notifications to various stages of servicing activities. Traditional methods like using the office monthly planning calendar, or paper-based tracking systems such as DLS-Special Servicing and FSA-2580 may also be used, though they might not offer the same level of efficiency and traceability as electronic counterparts.