Microsoft Teams Just Became Your Biggest Discovery Headache. We Fixed That.
Teams is now the largest source of modern communications data. StreemView is the only platform built from the ground up to handle it — from native Purview ingestion to focused RSMF production with 90%+ data reduction.
Request a Teams DemoEverything Teams eDiscovery Requires
Seven capabilities that don’t exist in retrofitted platforms — and that matter in every Teams matter.
Native Purview Ingestion
MSG and PST exports ingested directly — zero manual pre-processing. Auto-separation of Teams data from email and SharePoint in mixed exports.
Auto-Linked SharePoint Attachments
Every SharePoint-stored attachment is automatically linked back to the Teams message that referenced it. Contextual completeness from day one.
Message-Level Deduplication
One copy per message regardless of how many custodians possessed it. Full custodian attribution is retained — you know who had what, without paying for duplicates.
Full Thread Reconstruction
Replies are threaded with parent posts throughout the entire workflow. No orphaned messages, no lost context — every conversation is intact.
Mixed Export Separation
Purview exports often bundle Teams chats, email, and SharePoint content. StreemView auto-separates these at ingestion so you process and pay for only what you need.
Microsoft 365 Copilot Support
Full support for Copilot interactions within Teams data, including chain-of-thought visibility and proper separation from regular Teams chat content.
90%+ Data Reduction
Four sequential reduction layers — normalization, dedup, pre-RSMF search, and AI ECA — eliminate volume before anything reaches your review platform.
Modern Attachment Intelligence
Purview exports Teams messages, email, and SharePoint files together in MSG and PST format. StreemView automatically separates Teams chat data from unrelated email records and SharePoint content bundled in the same export — no manual pre-processing required.
SharePoint-exported files are then intelligently linked back to their parent Teams messages using Purview's own exported report files, so every attachment surfaces exactly where it belongs in the conversation thread. Once linked, StreemView automatically discards orphaned email records and SharePoint native files that were not Teams message attachments, shrinking the overall data footprint before processing begins.
Attachments can be held in a preservation state, giving reviewers full control over which conversations and messages are relevant before any native files are activated for processing. Only the attachments tied to selected messages are fully processed — shifting the cost burden to the data that actually matters and keeping the rest defensibly preserved without unnecessary expense.
Smart MSG/PST Separation
Automatically isolates Teams chat data from email records and SharePoint content in mixed Purview exports — eliminating manual sorting before ingestion.
Purview-Powered Attachment Linking
Matches SharePoint-exported files to their parent Teams messages using Purview's own export reports, reconstructing the native attachment relationship without manual intervention.
Automatic Content Cleanup
Discards orphaned email records and unlinked SharePoint native files that were not Teams message attachments, reducing storage footprint before processing begins.
Preservation-First Activation
Hold all attachments in a preservation state. Select the conversations and messages that matter, then activate only those native files for full processing — putting the cost burden where it belongs.
Preservation Without the Penalty
Messages collected
Across channels
Responsive messages
After search & filter
Activated attachments
Of 330K preserved
2.5 million messages. 330,000 attachments preserved in a quarantined preservation state. Search and filtering identify 120,000 responsive messages with 30,000 linked attachments. Only those 30,000 are activated for full native processing. The remaining 300,000 stay preserved — protected and defensible, but not billed at the full processing rate.
Two Controls That Make Chat Search Defensible — in Both Directions.
Chat eDiscovery has two distinct search problems: under-capture — where relevant messages are missed because terms fall across artificial day boundaries — and over-capture — where AND searches return results so far apart they share no real context. StreemView’s Context Window and Hit Window address both.
Capture What Surrounds the Hit,
Not Just the Hit Itself.
When a search term hits a message, Context Window automatically pulls in the neighboring messages — the conversation before and after — so reviewers see the full exchange, not an isolated result. ESI protocols increasingly address context windows for short-message content; StreemView implements them precisely and reports direct hits and context-expanded hits separately.
Window Size Options
All messages tagged for in-platform review or selective RSMF export.
Context Window Expansion Around a Search Hit
Stop AND Searches from Reaching Too Far —
or Not Far Enough.
Hit Window controls how far apart two terms can be in a conversation before an AND or proximity search stops counting them as a hit. Set it to Same Day (Relativity’s default) and you under-capture — missing hits that span a midnight boundary. Remove it entirely and you over-capture — returning terms with no real relationship. Hit Window gives you control in both directions.
Hit Window Presets
Same Day matches Relativity behavior for defensible comparison. User Defined enables fine-tuned ESI protocol compliance.
AND Search: “approve” AND “wire transfer”
4-minute conversation split by midnight → no hit returned. Relevant message lost.
Terms within 30-day window → hit returned, conversation surfaced for review.
No temporal relationship between terms → false positive without a Hit Window constraint.
Real-World Impact · AM Law 200 Slack Matter · 700K Messages · 5,400 Conversations · ±10 Context Window · 30-Day Hit Window
Teams eDiscovery Questions
How does StreemView ingest Microsoft Teams data?
StreemView ingests Teams data directly from Microsoft Purview exports in MSG and PST format — the standard custodial export format used by Microsoft 365. No manual pre-processing is required. StreemView automatically separates Teams chat data from email and SharePoint content that may be bundled in the same export.
How are SharePoint attachments handled?
When a Teams message references a SharePoint-stored document, StreemView automatically links that attachment back to the originating message. This means reviewers see the full picture — message plus attachment — without manually correlating records. Attachments are preserved at collection but only activated (billed at full rate) when linked to responsive messages.
How does StreemView handle Teams data from multiple custodians?
StreemView applies message-level deduplication across all custodians simultaneously. The same message possessed by 50 custodians produces one copy in the review set, with full attribution to all 50 custodians retained in metadata. This eliminates the 10x–50x volume inflation typical of multi-custodian Teams collections.
Does StreemView support Microsoft 365 Copilot interactions?
Yes. StreemView provides full support for Copilot interaction data within Teams exports, including prompts, responses, and chain-of-thought content. Copilot interactions are properly separated from regular Teams chat for targeted review.
Microsoft Teams eDiscovery Insights
Case studies and deep dives on Teams data in litigation and investigations.
The Significant Cost of Going Direct to RSMF: $1.1MM Saved
How searching first across 39 million chat messages produced a 97% reduction in review volume and nearly $1.1 million in cost savings.
Read case study →Hiding Below the Surface: StreemView Uncovers 500% More Relevant Messages
A side-by-side comparison showing how StreemView's contextual threading recovers messages that keyword-only searches miss entirely.
Read case study →The Microsoft Teams eDiscovery Guide
Everything legal teams need to know about preserving, processing, and producing Microsoft Teams data in litigation and investigations.
Read guide →Ready to See It on Your Teams Data?
Our pilot program walks you through the full pipeline on a real Purview export — collection through RSMF production.
Request a Teams Demo