What cybersecurity services does Decian provide?

Decian provides comprehensive cybersecurity services including SIEM, threat detection, incident response, penetration testing, security training, and compliance support through our Ironclad platform.

What is the difference between Office Support Professional and Shield?

Office Support Professional includes core IT services like 24/7 help desk, infrastructure monitoring, and backup services. Office Support Shield adds advanced security features including Ironclad SIEM, case management, and anti-spam protection.

How long has Decian been in business?

Decian Inc. has been providing enterprise technology solutions since 1999, with over 25 years of experience in cybersecurity and managed IT services.

Microsoft 365 SIEM Monitoring

Microsoft 365 account compromise is one of the most common ways businesses get breached. Ironclad centralizes your M365 audit and sign-in logs, correlates them with the rest of your environment, and surfaces suspicious activity as it happens.

Starting at $9.99 per license/month — no fixed commitment, cancel anytime.

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What Ironclad Detects in Microsoft 365

A sample of the Microsoft 365 activity Ironclad surfaces once your tenant is connected.

Microsoft 365

Suspicious inbox forwarding rule created
Anomalous sign-in (new location, device, or client)
Impossible travel between sign-ins
Privileged role assignment change
Mass file download or deletion
Suspicious OAuth application consent

See the full breakdown across every source in What Ironclad Detects, or the Microsoft 365 integration page for technical connection details.

How it connects

Log Collection

Ironclad connects to Microsoft 365 via the Microsoft Graph and Office 365 Management APIs, pulling unified audit log, mailbox audit, and Entra sign-in events on an ongoing basis — no agent required.

Deployment

Deployment is API-based: authorize Ironclad against your tenant with a scoped application registration, and log collection begins without installing anything on end-user devices.

Investigation

Analysts can pivot from an alert to the full audit trail for a user or mailbox — sign-ins, rule changes, file activity and admin actions — correlated alongside endpoint and network events from the same timeframe.