# Microsoft 365 Compliance Archiving for SEC & FINRA

Capture Outlook, Teams, SharePoint, and OneDrive in one external WORM archive. Independent of tenant admin, unified with WhatsApp, Signal, and iMessage.

Source: https://commacompliance.com/channels/microsoft-365-compliance-archiving
Last updated: 2026-05-25

---
{/* TODO(sasha): upload OG image */}

## Already using Microsoft 365? So are most of your clients.

The moment an employee texts a client from a personal phone, that conversation never touches Microsoft 365, and no archive of it will exist unless something else captures it. The channels people actually use outside Outlook and Teams, like [WhatsApp](/whatsapp-compliance-archiving), Bloomberg Chat, iMessage, and [others](/platform-integrations), don't live inside Microsoft 365. Purview wasn't built to capture them. FINRA's $2B+ in off-channel enforcement since 2021 has been almost entirely about communications outside the Microsoft stack.

When an examiner shows up, they don't care which platform stored what. They want every message between Rep X and Client Y, across every channel, immutable, and produceable within hours. [SEC Rule 17a-4](/regulations/sec-17a-4) requires records to be non-rewritable, non-erasable, and produceable in that window. [FINRA Rule 3110](/regulations/finra-rule-3110) requires written supervisory procedures to match the channels your team actually uses. WSPs that name Microsoft 365 but omit WhatsApp, Signal, or Slack are routinely cited.

Filling those gaps with a second archive means another vendor, another integration, another search interface, and another supervisory workflow your team has to run in parallel. Two archives means two exam exports. Cross-channel search becomes manual reconciliation, done under deadline pressure while an examiner is waiting.

Comma writes Microsoft 365 records to immutable WORM storage outside the tenant, and captures every non-Microsoft channel into the same archive. Search across every channel, produce records in one export, and close exam requests without stitching archives together.

## How Comma Closes the Gap

Comma captures Microsoft 365 alongside dozens of other channels into one immutable archive. One search interface, one supervisory review queue, one export. The Microsoft stack is covered. So is every channel your team uses that Microsoft doesn't.