Microsoft 365 Security Monitoring

Simplify security by improving your Microsoft 365 cloud security with detection, response, and reporting in one easy-to-use platform.

Try XDR free for 30 days

Free Microsoft 365 Cloud Security

Traditional SIEMs can take months to get fully operational. That’s why we designed the Blumira SIEM platform so any IT team can get out-of-the-box detection and response in minutes. With the Blumira Free edition you get:

No Data Limits

Microsoft 365 security coverage for unlimited users and data

Deploy in 30 Minutes

Easy, agentless integration setup with Cloud Connectors

Out-Of-The-Box Detections

Detections automatically rolled out to your account, fine-tuned to filter out noise

Security Insights

A summary dashboard of key findings and security reports

Guided Response

Each finding comes with a playbook to guide you through threat response

Response Actions

Threat response actions to lock out compromised users and revoke sessions, directly within Blumira

How Blumira Detects M365 Common Attacks

See how Blumira stops these common attacks before they begin.

User & Access Security
Monitor Microsoft 365 Login Activity

Attackers may attempt to take over legitimate user accounts in your Microsoft 365 environment to gain initial access or move around laterally. Blumira detects:
- Whenever multi-factor authentication (MFA) is disabled for an Azure Active Directory (AD) user
- Anomalous access attempts or the creation or deletion of an application password
- Any time a user clicks on a malicious URL or is restricted from sending an email
- Any impossible travel activity, indicating unauthorized access
- Multiple failed user logon attempts
- Critical events, notifying you to lock out compromised users and revoke sessions, directly within Blumira
Detect Privilege Escalation
Detect Privilege Escalation

Easily detect when Microsoft Exchange administrator privileges are elevated, which could indicate an attacker is attempting to gain additional permissions within your environment. Blumira identifies and sends you playbooks to respond to:
- Privilege escalation
- Creation of forwarding and redirect rules
- Suspicious inbox rule creation
Attackers may use inbox rules to remove or delete emails in order to lengthen the amount of time before a compromise is detected.
Stop Data Exfiltration
Stop Data Exfiltration

Secure your data by detecting signs that an attacker or malicious insider is stealing your organization’s information. Blumira identifies:
- When files are shared with personal email addresses
- Mass file downloads
- Whenever an email send limit is exceeded. This will protect against spam campaigns
Track Ransomware Activity
Malware & Ransomware Indicators

By detecting indicators of malware and ransomware early, Blumira helps your organization act quickly to minimize impact. Get alerted to:
- High rate of file uploads or deletion activity that could indicate an adverse encryption process
- Malware campaigns detected in SharePoint and OneDrive
- Malware campaigns detected after mailbox delivery
- Failed zero-hour auto purge when Microsoft’s email protection features are disabled
Identify Unusual Microsoft 365 Activity
Identify Unusual Microsoft 365 Activity

Blumira tracks anomalous activity in your environment:
- Any activity from anonymous or suspicious IP addresses
- Activity from infrequent countries or terminated users
- Unusual external file behavior
- Increases in phishing emails or ISPs (internet service providers) for an OAuth application
- Suspicious email sending patterns
Reports & Summary Dashboard
Dig Deeper With Microsoft 365 Security Reports

With the Blumira free Microsoft SIEM solution, you can gain greater insight into security trends over time with basic reporting on:
- Disabled accounts, deleted contacts, and any group changes
- Password changes or resets, and user or device added
- Failed user login attempts, overall login reports, and logins outside of North America
- Impossible travel activity and successful logins outside of the U.S.
- SharePoint files previewed or accessed
Upgrade to any paid edition for advanced reporting features, including the ability to schedule reports to run periodically.

Monitor Microsoft 365 Login Activity

Attackers may attempt to take over legitimate user accounts in your Microsoft 365 environment to gain initial access or move around laterally. Blumira detects:

Whenever multi-factor authentication (MFA) is disabled for an Azure Active Directory (AD) user
Anomalous access attempts or the creation or deletion of an application password
Any time a user clicks on a malicious URL or is restricted from sending an email
Any impossible travel activity, indicating unauthorized access
Multiple failed user logon attempts
Critical events, notifying you to lock out compromised users and revoke sessions, directly within Blumira

Detect Privilege Escalation

Easily detect when Microsoft Exchange administrator privileges are elevated, which could indicate an attacker is attempting to gain additional permissions within your environment. Blumira identifies and sends you playbooks to respond to:

Privilege escalation
Creation of forwarding and redirect rules
Suspicious inbox rule creation

Attackers may use inbox rules to remove or delete emails in order to lengthen the amount of time before a compromise is detected.

Stop Data Exfiltration

Secure your data by detecting signs that an attacker or malicious insider is stealing your organization’s information. Blumira identifies:

When files are shared with personal email addresses
Mass file downloads
Whenever an email send limit is exceeded. This will protect against spam campaigns

Malware & Ransomware Indicators

By detecting indicators of malware and ransomware early, Blumira helps your organization act quickly to minimize impact. Get alerted to:

High rate of file uploads or deletion activity that could indicate an adverse encryption process
Malware campaigns detected in SharePoint and OneDrive
Malware campaigns detected after mailbox delivery
Failed zero-hour auto purge when Microsoft’s email protection features are disabled

Identify Unusual Microsoft 365 Activity

Blumira tracks anomalous activity in your environment:

Any activity from anonymous or suspicious IP addresses
Activity from infrequent countries or terminated users
Unusual external file behavior
Increases in phishing emails or ISPs (internet service providers) for an OAuth application
Suspicious email sending patterns

Dig Deeper With Microsoft 365 Security Reports

With the Blumira free Microsoft SIEM solution, you can gain greater insight into security trends over time with basic reporting on:

Disabled accounts, deleted contacts, and any group changes
Password changes or resets, and user or device added
Failed user login attempts, overall login reports, and logins outside of North America
Impossible travel activity and successful logins outside of the U.S.
SharePoint files previewed or accessed

Upgrade to any paid edition for advanced reporting features, including the ability to schedule reports to run periodically.

Upgrade to Paid Editions

Unlock Greater Security Support & Coverage

It’s easy to upgrade to a paid edition including SIEM Pro, SIEM +, and XDR for:

Expert Support – Blumira is available to help with onboarding, guided response, and 24/7 SecOps for security incidents
Endpoint Visibility - Identify and prioritize endpoint risks, reduce your attack surface and prevent data loss with Blumira Agent.
Expanded Coverage – Gain broader visibility across your entire environment with additional cloud and on-premises third-party integrations
Automated Response – Block threats immediately with automatic host isolation, dynamic blocklists, and response actions directly within Blumira for faster remediation.
Extended Data Retention – Get one year of on-demand access to log data, ideal for compliance and cybersecurity insurance

View plans & pricing

Helping IT Teams Protect Their Microsoft Environment

Hear what our customers are saying.

“I researched a number of SIEM providers online and found most were way out-of-the-ballpark expensive, required a lot of infrastructure and didn’t provide a great return on our investment.”

Fritz Ludemann
Information Systems Administrator The City of Crescent City

“ Blumira added a new detection for malicious PowerShell activity. It flagged some activity in our environment. Blumira’s SecOps team immediately jumped on, saw that the scripts were legitimate activity coming from the Microsoft System Center monitoring agents, notified us that the alert was a false positive and that they had updated the detection rules for us.”

Matt Varblow
VP of Engineering Services, AdvantageCS

“ For a certain size of customer with no staff or only one security staff member, Blumira is an absolute godsend.”

Jason Waits
CISO, Inductive Automotive

Additional Resources for Microsoft 365 Cloud Monitoring

Critical Microsoft SharePoint Server vulnerability

Security Trends and Info

9 min read | July 24, 2025

Critical Microsoft SharePoint Server vulnerability allows unauthorized code execution

Customer Success Stories

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SIEM XDR

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Customer Story: NetCenter Technologies

Get Started for Free

Experience the Blumira Free SIEM, with automated detection and response and compliance reports for 3 cloud connectors.