Microsoft 365 Security for Accounting Firms – Tower Zero Security
Active incident? 203-560-0772
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SOC as a Service · Purpose-Built for Accounting Firms

Your Clients' Financial Data Is a Target.
We Make Sure It Stays Protected.

Tower Zero Security delivers 24/7 Microsoft 365 monitoring and incident response built specifically for accounting firms — protecting client financial records, tax data, and payment instructions from BEC attacks, ransomware, and account takeover.

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24/7 Microsoft 365 & Entra ID Monitoring — Continuous surveillance across your entire tenant — every identity event, sign-in, and admin action watched in real time.
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Tax Season Attack Protection — Filing season is peak BEC season. We increase monitoring intensity during high-risk periods when your team is under deadline pressure.
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IRS Publication 4557 Alignment — We help your firm meet the FTC Safeguards Rule and IRS data security requirements for tax preparers handling client financial data.
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BEC & Payment Fraud Prevention — We detect the silent inbox rules and account compromises attackers use to intercept client payments and redirect tax refunds.
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Full Incident Response with Documentation — When an incident happens, we contain it, investigate it, and produce the forensic documentation your cyber insurance carrier requires.
Trusted By Accounting Firms Law Firms Insurance Companies Huntress Secure Partner
Get Protected · No Obligation

Talk to a Security Engineer

Fill out the form and we'll be in touch within 24 hours. No sales pitch. No pressure.

No obligation · No sales pitch · Response within 24 hours
Active incident? Call now: 203-560-0772

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Message Received

We'll be in touch within 24 hours. For active incidents, call 203-560-0772 immediately.

The Threat Is Real and It's Targeting Accounting Firms

Accounting firms hold the financial data attackers monetize most directly.
Filing season makes them even more vulnerable.

94%
of breaches start with a compromised identity — not malware
17 days
average time an attacker spends inside M365 before discovery
60%
of small businesses that suffer a cyberattack close within 6 months
The Gap Attackers Exploit

Tax returns, bank statements, financial records — all sitting in your Microsoft 365 inbox.

Accounting firms hold some of the most sensitive financial data that exists — tax returns, bank account details, investment records, and payroll information for every client they serve. That data has direct monetization value for attackers targeting BEC, refund fraud, and financial account takeover.

Filing season compounds the risk. Your team is under deadline pressure, processing high volumes of sensitive documents, and moving money on behalf of clients. Attackers time their strikes accordingly.

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MFA doesn't protect you anymoreToken theft and legacy auth protocols bypass MFA entirely. An attacker with a stolen session token authenticates without triggering a single alert.
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Filing season is peak attack seasonAttackers know your team is busy, distracted, and handling large financial transactions under deadline. They plan around your calendar.
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Client financial data triggers notification obligationsA compromised account exposing client tax or financial records creates state breach notification requirements you may not be aware of.
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Ransomware shuts down your entire practiceEncrypted client files during filing season isn't just an IT problem — it's an existential operational and reputational crisis.
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Your IT company has no SOC visibilityMailbox audit logs, inbox rule creation, identity threat detection — none of this is in scope for your IT provider.
What We Do

Every service. One flat monthly rate.

Everything covered under a single flat monthly rate — no hourly billing when an incident happens.

01
24/7 Threat Monitoring & Detection
Continuous monitoring of your Microsoft 365, Entra ID, and endpoint environment — every sign-in, mail flow change, and admin action watched in real time by engineers who know what attacker behavior looks like.
02
Identity & Account Protection
We close MFA gaps, block legacy authentication protocols, and continuously monitor for account takeover — protecting the staff accounts where most breaches begin.
03
Phishing, BEC & Email Attack Investigations
We detect and investigate BEC at every stage — account compromise, inbox rule creation, client impersonation, and payment redirect attempts — stopping them before funds move.
04
Full Incident Response Ownership
When something happens, a senior engineer contains it, investigates it, and closes it — no handoffs, no ticket queue. Insurance and regulatory documentation included.
05
Cloud & Endpoint Security Coverage
Full visibility across your Microsoft 365 cloud environment and every endpoint via Huntress MDR — catching the threats that antivirus and your IT provider can't see.
Client Testimonials

What clients say when it matters most.

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Tower Zero Security responded immediately and handled the situation with complete professionalism and discretion. Their focus on identity security and rapid containment prevented what could have been a serious disruption to our practice and our clients.

Managing Partner
Mid-Sized Law Firm
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We were never passed between teams or left waiting on escalations. Tower Zero took full ownership from the first alert and communicated clearly at every step.

Chief Operating Officer
Professional Services Firm
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No downtime. No data loss. No public exposure. The assessment they ran when we onboarded caught three critical issues our IT company had missed for over a year.

Chief Financial Officer
Technology Company
Don't Wait for a Breach

Protect Client Financial Data Before an Attacker Gets to It First.

Get in touch with Tower Zero Security today. We'll walk through your Microsoft 365 environment and tell you exactly what an attacker would find — and what we'd do about it.

Get In Touch →

No obligation · No credit card · Response within 24 hours

Active incident or suspected breach? Do not wait. Call Now: 203-560-0772 →