Identity compromise has become one of the most effective ways for attackers to infiltrate business systems. Firewalls, endpoint protection, and monitoring tools mean little once an attacker logs in using valid credentials. For MSPs and corporate IT teams, strengthening identity security and enforcing least privilege access are two of the most powerful ways to reduce blast radius and stop attacks earlier.
This article outlines five practical steps to improve identity security across human, machine, and workload identities, while also building attack resilience through least privilege and continuous validation.
1. Enforce MFA everywhere—starting with high-privilege accounts
Multi-factor authentication remains one of the most effective defenses against credential-based attacks. Passwords alone cannot protect critical systems, particularly when phishing and infostealer malware continue to accelerate.
Start with the identities that carry the most risk:
- Admin accounts
- MSP technician accounts
- Cloud infrastructure accounts
- External-facing applications
- Remote access tools
Any MFA deployment is better than none, but phishing-resistant methods offer the strongest protection. Once privileged accounts are enforced, expand MFA to all users over the next 30 days. Doing so reduces the likelihood that compromised credentials lead directly to unauthorized access.
2. Implement privileged access management to control admin permissions
Least privilege is the second half of effective identity security. Even when a user successfully authenticates, they should only have access to the minimum resources required for their role. Privileged Access Management (PAM) helps enforce this by centralizing credential storage, eliminating shared administrative passwords, and controlling privilege elevation on endpoints.
N-able Passportal™ helps teams vault and rotate privileged credentials automatically and integrate credential hygiene with Microsoft Active Directory. This reduces the risk of privilege creep, orphaned accounts, and long-lived passwords that attackers routinely exploit.
For MSPs, centralized credential management prevents a compromised technician credential from granting access across dozens of client environments. For corporate IT teams, PAM reduces the likelihood that attackers can escalate privileges after gaining initial access.
3. Inventory every identity—human, machine, and workload
You cannot protect the identities you do not know exist. Most environments have far more machine and service accounts than human users, and these non-human identities often carry higher privileges with far less scrutiny.
A complete identity inventory should include:
- Employees, contractors, and vendor accounts
- Service accounts for scheduled tasks and automation
- API keys used in integrations
- Certificates supporting encrypted communication
- Application and workload identities used in cloud-native environments
Machine and workload identities need special attention because they rarely trigger alerts when abused. Attackers increasingly target them to escalate privileges quietly.
Maintaining this inventory helps IT teams identify shadow identities, remove unnecessary permissions, and reduce pathways attackers use for lateral movement.
4. Establish continuous validation to detect compromise earlier
Credential compromise often goes undetected for months. Continuous validation helps reduce that window by monitoring identity behavior in real time, such as:
- Impossible travel logins
- Sudden privilege escalations
- Activity from unmanaged devices
- Unusual authentication patterns
- Unexpected API usage
Modern identity attacks frequently blend automation, AI-driven phishing, and tactics that bypass traditional alerting. Continuous validation helps security teams catch these anomalies earlier and contain attacks before they spread.
Tools such as Adlumin ITDR™ support identity threat detection by monitoring Microsoft 365 logins, detecting abnormal identity behavior, and automatically taking action based on severity.
5. Build zero trust foundations by combining identity, devices, networks, applications, and data
Identity security is the first pillar of Zero Trust, but it cannot operate in isolation. Strong authentication means little if endpoints are unpatched or privileges are overly broad. To reduce lateral movement and strengthen attack resilience, Zero Trust requires continuous verification across five domains:
- Identity – authenticate every user and entity
- Devices – ensure endpoints meet security requirements
- Networks – limit movement using segmentation
- Applications – enforce granular permissions
- Data – protect sensitive information at the access layer
Identity compromise often becomes dangerous because organizations have uneven maturity across these pillars. For example, enforcing MFA but allowing unmanaged endpoints still gives attackers footholds they can use after initial access.
Tools like N-able N-central RMM™ help secure the device pillar by providing patch management, vulnerability scanning, and continuous endpoint monitoring. Cove Data Protection™ strengthens the data pillar by ensuring reliable recovery if identity compromise leads to ransomware or destructive activity.
Building identity-driven attack resilience
Identity security is not a one-time implementation. It is a continuous process of enforcing stronger authentication, removing unnecessary privileges, validating each access request, and monitoring for misuse.
A practical roadmap for IT and security teams includes:
- Enforce MFA for all identities, starting with privileged accounts.
- Deploy PAM to manage and secure administrative credentials.
- Document all identity types and remove or restrict unnecessary accounts.
- Monitor authentication behavior continuously to detect compromise early.
- Extend Zero Trust practices across devices, networks, applications, and data.
Taken together, these steps significantly reduce the likelihood that attackers can use valid credentials to gain broad access across your environment. They also help contain the impact when identity compromise does occur.
Download the new 2026 State of the SOC report and get a data-driven playbook for resilience across identity, endpoint, cloud, network, and perimeter layers.