CSM Premium combines Zero Trust endpoint protection with advanced Microsoft 365 email, identity, and data security to mitigate financial, operational, and reputational cyber risk.
Email has become a mission‑critical system for modern businesses, forming the primary channel for communication, collaboration, and identity. At the same time, cloud platforms such as OneDrive, SharePoint, and Microsoft Teams are now widely used to store and share business‑critical data, including private and confidential client information.
CSM Premium is designed for organisations using Microsoft 365 Business that require advanced protection of their email and cloud‑based data. It builds on everything included in CSM Essential, extending protection into the Microsoft 365 tenant itself to mitigate risks such as phishing, impersonation, account takeover, and accidental or malicious data loss.
CSM Premium implements layered preventive, detective, and recovery controls across Microsoft 365 email, identity, and cloud data to reduce cyber risk, support compliance, and improve insurance defensibility. It mitigates threats such as:
Deceptive emails designed to trick users into revealing login credentials, often leading to unauthorised access to Microsoft 365 accounts.
Emails containing harmful attachments or links that deliver malware or redirect users to fake login pages when opened or clicked.
Malicious software delivered through email that can infect devices, steal data, or enable further attacks across the organisation.
Unauthorised access to a Microsoft 365 account following credential theft, allowing attackers to read emails, send messages, and access cloud data.
Attacks where threat actors pose as executives, staff, or trusted partners to manipulate recipients into making payments or disclosing sensitive information.
Loss or damage to data stored in OneDrive, SharePoint, or Teams due to accidental deletion, ransomware, malicious activity, or synchronisation errors.
Cyber attacks that exploit user identities rather than software vulnerabilities, often involving stolen credentials, session hijacking, or abuse of trusted access.
CSM Premium includes the following advanced Microsoft 365 controls:
To filter and block malicious email‑borne threats before delivery
For Exchange Online, OneDrive, SharePoint, and Microsoft Teams to support recovery from accidental deletion, ransomware, or malicious activity
To support long‑term retention, search, and legal requirements
To detect and block attempts to mimic executives, staff, or trusted partners
Wthin the Microsoft 365 tenant, including abnormal sign‑ins, rule abuse, and suspicious behaviour across email and cloud services
CSM Premium includes all the protection of CSM Essential — endpoint Zero Trust controls, ransomware prevention, and attack‑surface mitigation — plus advanced Microsoft 365 email, identity, and cloud‑data protection.
Together, this gives you end‑to‑end cyber risk mitigation across devices, users, email, and cloud data.
Endpoint‑level Zero Trust controls from CSM Essential prevent unauthorised software, ransomware, and malicious activity by default, while CSM Premium mitigates email‑borne threats before staff can click or respond.
This significantly improves early‑stage threat mitigation and lowers the chance of incidents starting in the first place.
Impersonation protection mitigates the risk of attackers pretending to be executives or trusted suppliers — helping prevent fraudulent payment requests and financial loss.
If a Microsoft 365 account is taken over, abnormal behaviour is detected and contained quickly.
This mitigates lateral movement, limits business impact, and protects clients and partners.
If files or emails are deleted, encrypted, or corrupted — whether by ransomware, human error, or malicious action — cloud‑to‑cloud backups mitigate data loss by enabling fast recovery from
Wthin the Microsoft 365 tenant, including abnormal sign‑ins, rule abuse, and suspicious behaviour across email and cloud services
CSM Essential mitigates many attacks by design at the endpoint, while CSM Premium adds monitoring and response inside Microsoft 365.
This layered approach strengthens overall mitigation and reduces dependence on reactive alerts.
Real‑time email retention and litigation hold capability mitigates the risk of missing or deleted records, supporting audits, legal disputes, and regulatory requirements with confidence.
CSM Premium mitigates cyber risk across email, identity, and cloud data used in Microsoft 365 — helping your firm protect privileged communications, prevent impersonation fraud, and preserve records for legal and regulatory requirements.
CSM Premium protects accounting firms against phishing, account takeover, and data loss within Microsoft 365—helping safeguard financial records, client communications, and cloud‑stored data throughout the year.
CSM Premium combines Zero Trust endpoint protection with advanced Microsoft 365 email, identity, and cloud‑data security—mitigating cyber risk as your teams collaborate, share data, and work across client environments.