BRITECITY is transitioning POLARITY for Mailboxes clients from AppRiver to Check Point Email & Collaboration, delivering AI-driven threat protection across email, Microsoft Teams, SharePoint, and OneDrive at no additional cost. For businesses across Irvine and Orange County, this upgrade closes critical security gaps in the platforms your team uses every day.
By BRITECITY Team | Published February 18, 2026 | Irvine, CA
The Context
Email remains the number one attack vector for businesses of every size. Phishing campaigns, business email compromise (BEC), and malware-laden attachments account for more than 90% of successful cyberattacks. But email is no longer the only collaboration surface that attackers target. Microsoft Teams messages, SharePoint document libraries, and OneDrive file shares have become new entry points — and most email security tools do not cover them.
AppRiver has served POLARITY for Mailboxes clients well for email filtering, but the threat landscape has expanded beyond the inbox. Attackers now embed malicious links in Teams chats, upload infected files to shared drives, and use legitimate collaboration tools to bypass traditional email gateways. Protecting only the inbox leaves blind spots that adversaries actively exploit.
The Platform
Check Point Email & Collaboration is an API-based security platform that connects directly to your Microsoft 365 tenant. It scans every email, message, and file in real time using AI-driven threat detection — with no mail flow changes, no MX record updates, and no additional software on your devices.
Blocks phishing, BEC, impersonation attacks, and malware attachments before they reach the inbox. AI analyzes sender behavior, link destinations, and attachment content in real time.
Scans Teams messages and shared files for malicious URLs and infected documents. Prevents threat propagation through internal chat channels.
Monitors file uploads and shares across OneDrive and SharePoint for malware, ransomware, and data exfiltration attempts.
Uses machine learning trained on billions of data points to identify zero-day threats, novel phishing patterns, and sophisticated social engineering that rule-based filters miss.
Suspicious links and attachments are detonated in a secure sandbox environment before delivery. Known-bad content is stripped; unknown content is quarantined for analysis.
Detects sensitive data like credit card numbers, Social Security numbers, and HIPAA-regulated health information leaving your organization through any collaboration channel.
Beyond the Inbox
With AppRiver, POLARITY for Mailboxes protected one surface: your email inbox. Check Point extends that protection to five additional platforms your team relies on daily. Every file shared in Teams, every document uploaded to SharePoint, and every sync to OneDrive is now scanned in real time.
Threats blocked:
Phishing, BEC, malware attachments
OneDrive
Threats blocked:
Malware uploads, sensitive data exposure
SharePoint
Threats blocked:
Infected shared files, compliance violations
Teams
Threats blocked:
Malicious links, file-based attacks
Gmail
Threats blocked:
Cross-platform phishing campaigns
Google Drive
Threats blocked:
Shared malware, data exfiltration
Attackers embed malicious links in Teams messages knowing most security tools do not scan internal chat. Check Point intercepts these threats before anyone clicks.
Shared document libraries are a common vector for ransomware distribution. Check Point scans every upload and flags infected files before they propagate across the organization.
Files synced to OneDrive from personal devices can carry malware into the corporate environment. Check Point monitors every file sync and quarantines threats automatically.
How It Works
Check Point uses artificial intelligence trained on over 1.5 billion security data points to detect threats that signature-based tools miss. When a threat arrives — whether by email, Teams, or file share — the response is measured in seconds, not hours.
Phishing email, malicious file in Teams, or infected SharePoint upload
Check Point AI analyzes content, links, attachments, and behavior patterns
Malicious content removed and replaced with clear notification
Our team receives the alert, investigates, and handles escalation
Business continues uninterrupted — no action needed from your team
Seconds, not hours
From threat arrival to quarantine in under 3 seconds. BRITECITY handles the rest — your team never needs to take action.
AI models identify previously unseen attack patterns by analyzing behavioral signals rather than relying on known signatures. New phishing campaigns are caught on the first attempt, not after thousands of victims.
Check Point detects CEO fraud, vendor impersonation, and lookalike domain attacks by analyzing writing patterns, sender history, and authentication signals. BEC attempts are blocked before any employee can respond.
Your Experience
The short answer: almost nothing from your perspective. The migration happens entirely behind the scenes. BRITECITY connects Check Point to your Microsoft 365 tenant via API — there is no software to install, no MX record changes, and no downtime. Your team continues working exactly as before, with broader protection running silently in the background.
No action required from your team
BRITECITY handles the entire migration. No passwords to change, no apps to install, no training needed.
No change to your email workflow
Email arrives in Outlook the same way it always has. Quarantine notifications are clearer and more informative.
No additional cost
This upgrade is included in your existing POLARITY for Mailboxes subscription. Your monthly billing stays the same.
No downtime during migration
Check Point connects via API alongside your existing setup. Protection transitions seamlessly with zero interruption.
New: Teams, SharePoint, and OneDrive protection
The only visible change is expanded coverage. Files and messages across all collaboration platforms are now scanned automatically.
Side by Side
AppRiver provided solid email filtering, but it was designed for a world where email was the only collaboration tool that needed protection. Check Point is built for the modern Microsoft 365 environment where threats arrive through multiple channels simultaneously.
Before — AppRiver
1 of 9 attack surfaces monitored
After — Check Point
9 of 9 attack surfaces monitored
Email Inboxes
OneDrive Files
SharePoint Sites
Teams Messages
Teams File Shares
Gmail
Google Drive
AI Threat Detection
Compliance Scanning
From 11% to 100% coverage. No additional cost.
| Capability | AppRiver | Check Point |
|---|---|---|
| Email filtering | ||
| AI-driven threat detection | — | |
| Teams message scanning | — | |
| SharePoint file protection | — | |
| OneDrive malware scanning | — | |
| URL sandboxing | — | |
| BEC / impersonation detection | — | |
| DLP compliance scanning | — | |
| API-based (no MX changes) | — |
The Rollout
BRITECITY is rolling out the Check Point migration in phases to ensure every client transitions smoothly. Each phase follows a tested playbook with verification steps before, during, and after activation.
Feb 2026
API connection established to your Microsoft 365 tenant. Check Point begins monitoring in observation mode alongside AppRiver.
Mar 2026
Check Point threat detection validated against live traffic. BRITECITY reviews detection accuracy and tunes policies for your environment.
Apr 2026
Active protection enabled. Check Point takes over threat blocking for email, Teams, SharePoint, and OneDrive. AppRiver retired.
Ongoing
Continuous monitoring by BRITECITY. Policies updated as new threat patterns emerge. Monthly threat reports delivered to your team.
Quarantine Process
Check Point is designed to be aggressive in blocking threats and conservative in disrupting your workflow. When a malicious or suspicious file is detected, the following process kicks in automatically:
Threat detected and quarantined
The malicious file is removed from the inbox, Teams chat, SharePoint library, or OneDrive folder. A clear notification replaces it explaining what happened.
BRITECITY receives the alert
Our security team is notified immediately. We investigate the threat, assess the scope, and determine if further action is needed.
False positive? We release it immediately
If a legitimate file is caught by mistake, contact BRITECITY. We review the file, verify it is safe, and release it from quarantine — typically within minutes.
Policies refined over time
Every quarantine event informs the AI model. BRITECITY tunes policies monthly to reduce false positives while maintaining the strongest possible threat detection.
Looking Ahead
Microsoft 365 is no longer just an email platform. It is the operating system for modern work — combining communication, file storage, project management, and real-time collaboration in a single environment. Security that only covers email is like locking the front door while leaving every window open.
The shift toward hybrid and remote work has accelerated adoption of Teams, SharePoint, and OneDrive across businesses in Orange County and beyond. Attackers have followed this shift. Threat actors now craft attacks that span multiple Microsoft 365 services in a single campaign — sending a phishing email that links to a malicious file hosted in a compromised SharePoint site, for example.
Check Point Email & Collaboration is built for this reality. It treats Microsoft 365 as a unified attack surface and applies consistent AI-driven protection across every service. As Microsoft continues expanding its collaboration suite, BRITECITY and Check Point will extend protection to match — keeping your business covered without additional products, agents, or cost.
By the Numbers
6
platforms protected (up from 1)
<3s
from threat arrival to quarantine
$0
additional cost to existing clients
0
minutes of downtime during migration
No. BRITECITY is absorbing the cost of this upgrade as part of your existing POLARITY for Mailboxes subscription. You receive expanded protection across Microsoft Teams, SharePoint, OneDrive, and email with no change to your monthly billing.
Nothing. BRITECITY handles the entire migration behind the scenes. Check Point connects via API to your Microsoft 365 tenant — there is no software to install, no settings to change, and no downtime during the transition. Your team will not notice any disruption.
When Check Point detects a malicious file in email, Teams, SharePoint, or OneDrive, it quarantines the file and replaces it with a notification explaining what happened. BRITECITY receives an alert, investigates the threat, and handles any escalation. If a legitimate file is quarantined by mistake, contact BRITECITY and we will release it immediately.
Check Point Email & Collaboration protects Microsoft 365 email (Exchange Online), Microsoft Teams messages and file shares, SharePoint Online document libraries, OneDrive for Business files, Gmail, and Google Drive. All of these platforms are scanned in real time using AI-driven threat detection.
Orange County businesses face a growing volume of targeted phishing and business email compromise attacks. With BRITECITY based in Irvine, local businesses get hands-on support from a team that understands the regional threat landscape. The Check Point upgrade adds AI-powered protection across the full collaboration stack — not just email — which is critical for the hybrid workforces common across Irvine, Newport Beach, and the broader Orange County market.
BRITECITY helps businesses across Irvine, Newport Beach, and Orange County stay protected with proactive security upgrades like this one. If you have questions about the Check Point migration or want to learn more about POLARITY for Mailboxes, we are here to help.