BarracudaOne: How AMVIA Keeps Your Business Compliant and Protected

Why Businesses Add BarracudaOne to Microsoft 365

Microsoft 365's built-in email security — Exchange Online Protection plus Defender for Office 365 — is a strong baseline. For many businesses it's sufficient. But there are scenarios where the built-in tools have meaningful gaps: advanced targeted phishing, email archiving and compliance, email continuity during Microsoft outages, and comprehensive backup that covers the specific recovery requirements of regulated industries.

BarracudaOne is Barracuda Networks' unified email security and data protection platform. AMVIA deploys it for businesses that need capabilities beyond what Microsoft's native tools provide, or for organisations with specific compliance obligations that require independent archiving and email continuity.

What BarracudaOne Includes

Advanced Email Security

BarracudaOne's email security layer sits in front of Exchange Online, processing inbound email before it reaches Microsoft's filtering stack. It provides:

• AI-powered phishing and impersonation detection — using machine learning to identify targeted spear-phishing attacks and BEC (Business Email Compromise) attempts that evade signature-based filters
• Link protection — real-time URL scanning and click-time protection across email clients and mobile
• Attachment sandboxing — detonates suspicious attachments in an isolated environment, blocking zero-day malware threats
• Account takeover protection — monitors mailbox behaviour for signs of compromise (unusual sending patterns, mail rule changes, forwarding rule additions) and alerts administrators
• Outbound email filtering — prevents compromised accounts from sending spam or phishing email from your domain, protecting your domain's sending reputation

Email Archiving

BarracudaOne provides a tamper-proof, cloud-based email archive that captures every inbound and outbound email — including deleted emails — in a legally defensible format. This is independent of Microsoft's mailbox and retention policies, meaning data is preserved even if users delete emails, an account is deleted, or a Microsoft licence lapses.

Key features of the archive:

• Indefinite retention (or configurable policy)
• Tamper-proof — users cannot delete archived emails
• Full-text search across all archived email
• Legal hold and eDiscovery export capability
• Access for compliance officers and legal teams without IT involvement

For UK businesses in financial services, legal, healthcare and insurance — where email records must be retained for 6-10 years and be producible on request — independent email archiving is essential. This is the primary reason regulated businesses deploy BarracudaOne.

Email Continuity

If Microsoft 365 experiences an outage, BarracudaOne's email continuity service provides a temporary webmail interface that allows staff to continue sending and receiving email using the archive as a live mailbox. When Microsoft 365 comes back online, emails sent during the outage are synchronised automatically.

Microsoft 365 outages are infrequent but do occur. For businesses where email downtime has a significant commercial impact — legal or financial firms where delays affect transactions — continuity is a risk mitigation measure worth the cost.

Microsoft 365 Backup

BarracudaOne includes automated backup of Microsoft 365 data — Exchange, SharePoint, OneDrive and Teams. This provides the point-in-time recovery capability that Microsoft's recycle bin and version history don't fully provide. Backups run daily, and recovery can be performed at the individual item level (single email, file or Teams conversation) or at the mailbox/site level.

Who BarracudaOne Is Designed For

BarracudaOne is best suited to:

• Regulated businesses — financial services, insurance, legal, healthcare, and others with documented email retention and discovery requirements
• Businesses that have experienced email compromise — and want a second layer of protection beyond EOP/Defender
• Organisations with strict data sovereignty requirements — Barracuda provides UK/EU data residency options
• Businesses prioritising email continuity — where email downtime creates immediate commercial or contractual risk

BarracudaOne and Business Premium Together

BarracudaOne and Microsoft 365 Business Premium are complementary rather than redundant. Business Premium's Defender for Office 365 provides real-time threat protection within the Microsoft ecosystem. BarracudaOne adds independent archiving, continuity and backup that remain functional regardless of what happens to the Microsoft 365 tenant. AMVIA typically recommends Business Premium as the foundation with BarracudaOne added for businesses where compliance or continuity requirements make the additional protection necessary.

AMVIA deploys and manages BarracudaOne for UK businesses as part of our managed email security service. For businesses assessing whether the platform is appropriate for their requirements, we provide an initial consultation to assess compliance obligations and existing tool coverage.