Identity Threat Detection & Response (ITDR)
24x7 Security Operations monitoring, investigation, and response for Microsoft 365 and Google Workspace identities.
If an attacker signs in as one of your users, they can intercept vendor conversations, redirect payments, change mailbox rules, access shared files, and operate from inside a trusted account.
Guardian ITDR helps you assess whether suspicious account activity may already be present, then adds ongoing detection and response around the identities your business depends on.
Review available Microsoft 365 or Google Workspace activity for signs of suspicious account behavior, possible compromise, and identity gaps that need attention.
Why identity risk needs its own protection
Most businesses already have email filtering, endpoint protection, MFA, and network security.
Those controls are critical, but many account attacks begin after a successful login. Once an attacker is inside a real account, the risk moves into email, files, approvals, vendor conversations, and business workflows.
Identity is the new perimeter
Email access can become financial access
Some attacks get around MFA
Traditional tools may miss post-login behavior
Where Guardian ITDR focuses
For many organizations, identity lives in Microsoft Entra ID or Google Workspace managed accounts.
That identity layer is the front door to email, files, business apps, shared drives, approvals, and customer conversations.
Guardian ITDR focuses on the identity platform your users rely on to sign in and work. Most organizations need coverage for Microsoft 365 or Google Workspace. Some use both, but one platform usually controls the primary sign-in experience.
The Identity Risk Assessment helps confirm which environment should be reviewed and what visibility is available.
Start with an Identity Risk Assessment
Before you commit to ongoing ITDR, it helps to know what is already happening.
The Identity Risk Assessment reviews available account and identity activity in Microsoft 365 or Google Workspace to look for signs of suspicious behavior, possible compromise, and gaps that could make account takeover harder to detect or contain.
It can help answer:
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Are there signs an account may already be compromised?
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Are suspicious forwarding rules, filters, app permissions, or sessions creating risk?
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Which users or roles create the greatest business exposure?
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Where are identity controls, MFA settings, or response processes weaker than they should be?
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What should be fixed first?
What Guardian ITDR does
Guardian ITDR is designed to help detect and respond to identity-led attacks before they turn into larger business events.
Monitors identity activity
Guardian ITDR monitors sign-ins, account changes, mailbox activity, and cloud activity for signs of suspicious behavior.
Reviews suspicious behavior 24x7
Security Operations specialists review suspicious activity and help separate likely threats from alert noise.
Responds through approved playbooks
When likely compromise is confirmed, response follows the playbooks your organization approves in advance.
Reports what happened
Incident details and recommendations help leadership and IT understand what was touched and what should improve.
What Guardian ITDR helps detect and contain
Account takeover
An attacker signs in as a real user and begins operating inside email, files, or business apps.
BEC - Business Email Compromise
A compromised account is used to redirect payments, impersonate vendors, change approval workflows, or manipulate invoice conversations.
Mailbox rule and forwarding abuse
A malicious rule forwards emails externally, hides alerts, deletes messages, or gives the attacker ongoing visibility.
Suspicious login behavior
Unusual locations, risky sign-in patterns, credential attack signals, or unexpected account activity indicate something needs review.
Credential attack patterns
Password spraying, weak passwords, and recycled credentials can give attackers a path into trusted accounts.
MFA bypass and trusted access abuse
Some attacks pressure users, steal sessions, or abuse valid access after login, which is why post-login monitoring is so important.
Microsoft 365 and Google Workspace coverage
Guardian ITDR supports Microsoft 365 and Google Workspace.
The business risk is the same across both platforms: a trusted account gets abused. The signals and response actions vary by platform, configuration, licensing, and available logs.
For Microsoft 365 environments
If Microsoft Entra ID is your identity front door, Guardian ITDR focuses on the identity, mailbox, and collaboration activity where account takeover usually shows up.
Common areas of focus include:
- Entra ID sign-ins and authentication patterns
- MFA changes, password resets, and risky sign-in behavior
- Exchange Online inbox rules, forwarding, send-as, and send-on-behalf abuse
- SharePoint, OneDrive, and Teams activity that may indicate suspicious access or data movement
- Risky OAuth app consents and trusted-session abuse
- Response actions such as session or token revocation, malicious rule removal, and secure reset guidance according to approved playbooks
For Google Workspace environments
If Google Workspace managed accounts are your identity front door, Guardian ITDR focuses on suspicious sign-ins, Gmail activity, and account behavior tied to account takeover and BEC.
Common areas of focus include:
- Google Account sign-ins and suspicious login analytics
- Unapproved country and geo-risk login alerts
- Credential-based attack pattern recognition
- Gmail external forwarding rule creation
- Suspicious Gmail filter activity
- Suspicious email configuration changes
- Response actions such as Google account disablement, stakeholder notification, and remediation guidance according to approved playbooks
How the service works
When action is needed, response follows the approved playbook. Reporting and recommendations help strengthen identity controls over time.
How Guardian ITDR fits your existing security stack
Guardian ITDR is designed to complement your existing controls.
Email security
Email security helps block malicious messages. ITDR focuses on what happens when an attacker gets into a valid account.
MFA and native platform controls
MFA and built-in Microsoft or Google controls are important. ITDR adds monitoring, review, and response support around suspicious account behavior.
Endpoint protection and MDR
Endpoint and MDR tools are valuable, but many identity attacks don’t require malware. ITDR adds visibility into cloud account activity.
Internal IT
Your IT team stays in control. Guardian ITDR adds 24x7 monitoring and response support so suspicious account activity isn’t missed after hours or buried in alerts.
Who Guardian ITDR is for
Microsoft Entra ID or Google Workspace Users
Cloud-First Business Operations
High-Value and Privileged Users
Protection Against Account Takeover & BEC
No Dedicated Identity Security Team
Cut Through Alert Fatigue
Assessment Before Long-Term Commitment
Clear Threat Visibility & Reporting
Businesses seeking straightforward reporting, actionable insights, and timely notifications when suspicious account behavior is detected.
Frequently Asked Questions
ITDR stands for Identity Threat Detection and Response.
It focuses on monitoring identities, sign-ins, account activity, mailbox behavior, and suspicious changes that may indicate account compromise. The goal is to detect identity-led attacks and support fast response before they turn into fraud, data exposure, or downtime.
Yes. Guardian ITDR supports Microsoft 365 and Google Workspace.
The business goal is the same across both platforms: monitor identity activity, investigate suspicious behavior, and help contain likely compromise. The technical signals and response actions vary by platform.
The assessment reviews available Microsoft 365 or Google Workspace activity for signs of suspicious account behavior, possible compromise, and identity control gaps.
The goal is to give leadership and IT a clear readout of what may be happening now, what needs attention, and where ongoing ITDR can help.
No. No assessment can prove that every event did or didn’t happen.
The assessment is designed to review available identity and account activity for evidence of suspicious behavior, possible compromise, and control gaps that need attention.
No. MFA is an important baseline control, but it doesn’t eliminate identity risk.
Some attacks are designed to get around MFA through adversary-in-the-middle phishing, MFA fatigue, stolen sessions, or trusted access that remains active. ITDR focuses on account behavior before and after login, not just the login prompt.
Email security helps stop malicious messages before they reach users.
Guardian ITDR focuses on what happens after a successful login. That includes suspicious sign-ins, forwarding rules, filter changes, mailbox abuse, risky app access, and account behavior that may indicate an attacker is already inside.
MDR services focus on endpoints, networks, and security telemetry.
Guardian ITDR focuses specifically on cloud identities and account activity. It can complement MDR by adding coverage for attacks that don’t require malware or traditional endpoint compromise.
Specific visibility and response options can vary based on your platform, licensing, configuration, and available logs.
The Identity Risk Assessment helps confirm what can be reviewed, what response options are available, and where better controls may be needed.
Response follows the playbooks approved in advance.
Depending on the platform, configuration, and customer authorization, that may include securing or disabling the account, revoking sessions or tokens where supported, removing malicious rules, notifying stakeholders, guiding secure password resets, and providing remediation guidance.
Yes. Guardian ITDR can be discussed as a standalone managed service or as part of a broader Guardian managed cybersecurity program.
Could someone already be inside one of your cloud accounts?
You don’t need to guess.
Start with an Identity Risk Assessment to review available Microsoft 365 or Google Workspace activity for signs of suspicious account behavior, possible compromise, and identity gaps that need attention.