The correct action is to increment the job priority in Activity Monitor for the specific queued job. Cohesity NetBackup documentation states that an administrator can dynamically change the priority of selected queued or active jobs that wait for resources directly from the Activity Monitor by selecting the job and choosing Change Job Priority. The available options include setting a specific priority, incrementing the job priority, or decrementing it, and the change affects only the selected job rather than all jobs of that type. This matches the requirement: a small subset of queued jobs must be favored during the same backup session, without changing long-term policy behavior.
Changing the priority in the policy is less appropriate because the policy attribute defines how that policy competes with other policies for resources, and is a configuration-level setting rather than an immediate per- job intervention. NetBackup uses job priority as a scheduling guide; higher-priority requests are evaluated before lower-priority requests, although resource optimization can still influence final selection. Therefore, the operationally correct response is option A.

The correct log is the vnetd proxy log. NetBackup secure host communication uses host ID-based certificates and certificate revocation lists (CRLs). When communication fails between the primary/master server and a client because a certificate is revoked, unavailable, missing, or affected by CRL validation, the relevant troubleshooting path is the vnetd proxy process log files. Cohesity's NetBackup Troubleshooting Guide states that for host-certificate troubleshooting, administrators should examine job details for certificate, revocation, and CRL messages, and "may need to examine the vnetd proxy process log files" for related messages and status codes. The same guide notes that NetBackup hosts must have a valid host ID-based security certificate and a valid CRL to communicate; otherwise, communication fails. For a revoked primary server certificate, Cohesity specifically identifies that the vnetd proxy process log files on hosts show that the primary server certificate is revoked. Therefore, nbemm is for Enterprise Media Manager functions, bprd is request processing, and nbrb is resource brokering; none is the primary diagnostic log for certificate revocation analysis. Reference topics: Troubleshooting security certificate revocation, Viewing vnetd proxy log files, and Test the vnetd proxy connections.

The required step is to verify that the third-party OST target supports Accelerator with VMware-type policies in the Hardware Compatibility List. Cohesity NetBackup documentation states that Accelerator for virtual machines uses VMware Changed Block Tracking (CBT) to identify changes inside the virtual machine, not the Windows NTFS or ReFS change journal. The same VMware Accelerator requirements topic lists supported disk storage destinations and includes qualified third-party OpenStorage devices, then specifically instructs administrators to verify Accelerator support for the storage unit in the NetBackup hardware compatibility list for supported OST vendors. It also warns that if the storage unit does not support Accelerator, the backup can fail with messages such as the storage server type not supporting accelerator backup. The HCL further identifies Accelerator with VMware-type policies as a distinct OpenStorage supported-functionality entry, meaning generic OST support is not sufficient; the vendor/device must support the VMware Accelerator capability. (Veritas Download) Option A applies to file-system Accelerator behavior for Windows clients, not VMware image-level backups. Option C is not mandatory for the first successful VMware backup. Option D is incorrect because VMware Accelerator does not require manually creating a client track log.