When troubleshooting a single Cisco Unified Presence user complaint, which is the Cisco recommended tool to start the troubleshooting process?

The Cisco Unified Real Time Monitoring Tool (RTMT) is designed for system-wide service monitoring, counter collection, and log gathering, making it more appropriate for service-level or multi-user issues than a single-user investigation.

The Cisco Unified Presence System Troubleshooter runs system-level diagnostic checks across the deployment and is not optimized for inspecting the presence state of one specific user.

No standard Cisco product called the 'Cisco Unified Presence Monitoring Tool' exists; this option is a distractor with no corresponding real Cisco tool.

The Cisco Unified Presence Viewer lets an administrator search for a single user and immediately inspect that user's current presence state, active watchers, and subscription status in real time, which isolates the problem scope before broader tools are needed. This focused visibility makes it the most efficient starting point when only one user is affected.