This guide provides a practical Google Workspace security checklist for 2026 covering real-world risks, compliance expectations, and the security features that matter most today.
TL;DR
- Google Workspace is very secure, but misconfiguration is the biggest risk for organisations.
- 6 critical areas define strong Google Workspace security in 2026: identity, email, AI controls, data protection, device security, and domain protection.
- The biggest Google Workspace security risks are phishing, account takeover, weak admin controls, and poor domain/email authentication.
- A regular Google Workspace security assessment dramatically reduces risk.
- Refractiv provides Google Workspace domain security audits and DMARC setup and monitoring to identify misconfigurations and stay aligned with UK compliance standards.
For IT administrators and business owners, maintaining a robust Google Workspace security protocol is no longer a “set-and-forget” task; it is a continuous process of evolution.
In 2026, attackers are no longer “breaking in” through technical exploits alone. They are:
- Exploiting misconfigured security settings
- Abusing trusted workflows
- Impersonating domains via email spoofing
- Targeting admins rather than end users
The 6-Point Google Workspace Security Checklist for 2026
Whether you are a small business or a large enterprise, understanding how to secure your Google Workspace requires a layered approach that balances Google security features with proactive human oversight.
1. Lock Down Identity & Access (Zero Trust First)
Identity remains the primary attack point. The first step in any Google Workspace security checklist is enforcing phishing-resistant authentication.
Enforce 2-Step Verification (2SV) for all users and try to switch from SMS and push notifications to passkeys, authenticator apps or hardware security keys (especially for admins). The NCSC (National Cyber Security Centre) recommends moving away from SMS-based MFA for all business-critical systems.
With an Enterprise plan you can also apply context-aware access, for example, only allow access from the UK or specific branch offices and require that devices are running the latest OS version.
Finally, always separate super admins from daily user accounts.
UK organisations handling personal data should treat identity protection as a UK GDPR requirement, not an IT option.
This is usually the first area reviewed in a Google Workspace security assessment, as poor identity controls undermine every other security feature.
2. Strengthen Email Security & Phishing Defences
Email remains the #1 threat vector in 2026.
We recommend disabling auto-forwarding to external addresses and training your users to always report suspicious messages.
Enforce SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) to authenticate your outgoing emails. Then, enforce a DMARC (Domain-based Message Authentication, Reporting, and Conformance) policy for your domain.
DMARC allows you to tell receiving servers exactly what to do with emails that claim to be from you but fail authentication: ignore them, quarantine them, or reject them outright.
Refractiv provides DMARC setup and monitoring to:
- Implement SPF, DKIM, and DMARC correctly on all your sending sources
- Safely enforce a reject policy
- Monitor abuse and spoofing attempts
- Protect brand trust and deliverability
3. AI Security
Google Workspace now includes features to manage how Gemini interacts with your data.
Review your Gemini settings and define what data Gemini is allowed to access (emails, documents, other Drive files, etc.) or restrict AI usage for sensitive teams or by OU or group.
“Shadow AI”, or the use of unapproved AI tools by employees, has also become a major risk. Ensure that sensitive corporate data isn’t being used to train public models by implementing an AI policy. Check out the latest AI Data Privacy and Security Guide from Refractiv.
4. Conduct a Google Workspace Security Assessment
A configuration that was secure last year might be vulnerable in 2026.
To ensure your environment meets the latest security and UK compliance standards, consider a comprehensive security audit for your Google Workspace domain. This assessment identifies misconfigurations that internal teams often overlook.
A structured Google Workspace security check will often uncover dozens of weak points, including weak passwords, publicly accessible files, and more.
5. Audit OAuth and Third-Party App Permissions
One of the biggest security risks in 2026 is “consent phishing.” This occurs when a user accidentally grants a malicious app permission to read their emails or files via an OAuth pop-up.
Review the “App Access Control” section in your Admin Console. Revoke access for any apps that haven’t been used in 90 days or those that request excessive permissions (like “Read, send, and delete all email”).
Also consider “closing the door” completely so users have to request permission to add 3rd party apps.
6. Manage Devices & Endpoint Access
In 2026, security must follow the device. Here’s how to secure your Google Workspace across devices:
- Enforce device approval for email access
- Require screen locks and encryption
- Block access from outdated OS versions
- Separate corporate and personal devices
- Enable remote wipe for lost devices
Endpoint mismanagement is one of the fastest ways attackers gain persistent access to Workspace data.
Is Google Workspace email more secure than Gmail?
Yes. While they share the same underlying infrastructure, Google Workspace security features are far more robust than personal Gmail. Workspace provides:
- Administrative control over password policies and MFA.
- Advanced phishing and malware protection (not available on free accounts).
- The ability to enforce DMARC and S/MIME encryption.
- Ownership of data (if an employee leaves, the business retains the data).
How secure is Google Workspace?
Google Workspace is one of the most secure productivity suites in the world, boasting 99.9% uptime and zero known exploited vulnerabilities in its core infrastructure over the last several years. However, its security is a “shared responsibility.” In simple terms, Google secures the infrastructure, but you are responsible for configuring the settings, managing users, and ensuring your Google Workspace security checklist is up to date.
Security Is a Process, Not a Setting
Google Workspace is one of the most secure productivity platforms available in 2026. But security does not come from defaults. It comes from:
- Proper intentional configuration
- Regular reviews
- Understanding how people actually work
- Protecting identity, email, data, AI, and your domain together
If you’re unsure where you stand today, start with a Google Workspace security assessment and ensure your domain is protected with DMARC.
