Rodnellium is my technical portfolio and working lab for practical IT systems, infrastructure, troubleshooting, automation, and continuous development toward deeper systems administration responsibilities.
Start with evidence, narrow the scope, validate assumptions, and work toward a repeatable resolution.
Work across identity, endpoints, Microsoft 365, business applications, connectivity, and user experience.
Use PowerShell, repeatable workflows, and clear documentation to make technical support more consistent.
Sanitized examples of practical IT work. Internal names, account details, addresses, and infrastructure identifiers are intentionally excluded.
A high-volume mailbox was approaching capacity and required a sustainable archive and access strategy.
ApproachReviewed mailbox statistics and permissions, enabled archive capabilities, applied retention behavior, and validated migration progress.
ResultReduced primary-mailbox pressure while preserving access to historical mail and improving long-term mailbox management.
Move a user endpoint from a legacy domain environment into a new domain without losing user data or browser continuity.
ApproachProtected files with cloud backup, migrated the workstation and profile workflow, validated Microsoft sign-in, and restored browser favorites.
ResultCompleted the domain transition with user data preserved and minimal disruption to the working environment.
Business connectivity was degraded across site services, with inconsistent reachability and remote-management impact.
ApproachValidated local gateway access, DNS behavior, external reachability, interface routing, and proxy configuration before escalating with evidence.
ResultIsolated the issue to upstream firewall resource pressure and supported the vendor escalation with reproducible diagnostics.
Repeat administrative tasks needed faster, more consistent methods for support and systems troubleshooting.
ApproachBuilt and refined commands for mailbox permissions, statistics, device-state checks, file validation, and repeatable diagnostics.
ResultReduced manual steps, improved verification, and created reusable workflows that can be documented and repeated.
Technologies I regularly work with, troubleshoot, administer, or continue to develop around.
Exchange Online, identity, collaboration, mailbox administration, and cloud support.
Domain environments, profiles, endpoint configuration, authentication, and administration.
Administrative commands, repeatable diagnostics, automation, and support workflows.
DNS, routing, Wi-Fi, VPN, connectivity testing, and structured incident troubleshooting.
Windows devices, application deployment, user onboarding, hardware, and remote support.
Microsoft cloud services, device registration, account access, and identity troubleshooting.
Endpoint alerts, threat validation, secure-access tooling, and escalation workflows.
HTML, CSS, JavaScript, Hostinger, static-site deployment, and practical site maintenance.
Rodnellium is built around practical IT work: solving problems, improving systems, documenting what works, and continuing to grow across infrastructure, cloud, networking, and automation.
Start with evidence, isolate the issue, test assumptions, and verify the actual cause before changing the environment.
Prefer solutions that are stable, understandable, supportable, and appropriate for the environment they serve.
Turn repeat administrative work into reusable commands, scripts, and workflows when automation improves consistency.
Capture the cause, fix, validation steps, and lessons learned so the next response is faster and easier to repeat.
Rodnellium Notes
Microsoft 365
Practical notes on mailbox administration, Exchange Online, permissions, retention, and day-to-day cloud support.
PowerShell
How repeatable commands, diagnostics, and scripts can make technical support and systems administration more consistent.
Networking
A field-oriented troubleshooting process for DNS, routing, Wi-Fi, VPN, firewall, and connectivity issues.
