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Updated October 2026

Outlook and Microsoft 365 data for AI training: can you license it?

Independent and sourced. We feature companies that pay us a referral fee. Our scores and reviews don't change for it. How we earn

Spirit Airlines' archive included about 100M emails, and Google bid $10M for it.1,2

Match my companyWhat is it worth?

Outlook mailboxes, SharePoint sites and OneDrive folders are where most established firms keep their working history, and often their only complete record of how a client relationship or a project actually went.

Mercor lists Outlook and Teams among the tools it buys data from, Polyshares buys email and shared files, and micro1 asks for internal docs, SOPs and knowledge bases. At the top end, Spirit Airlines' archive of about 100M emails and 500M Teams messages drew a $10M bid from Google. This page covers what buyers value in a Microsoft 365 tenant and what to agree before an export.

Buyers

Who buys Microsoft 365 data

Each reason is the buyer's own published statement naming Microsoft 365 or the kind of data it holds.

Featured partners

  1. #1 in our ranking

    7.7 out of 10

    micro1

    Wants internal docs, SOPs and knowledge bases, which many firms keep in SharePoint.3

    Typical payout
    $100K to $2M+, micro1 says4

    Watch out for: Says it removes personal details only "when relevant", so ask exactly how.5

    Get matchedRead the reviewVisit micro1

  2. #2 in our ranking

    7.4 out of 10

    Polyshares

    Buys email and shared files alongside chat, tickets and ERP exports.6

    Typical payout
    $100K to $2M+, Polyshares says7
    Fees
    None, Polyshares says8
    Time to get paid
    An offer in 1 to 2 weeks, then paid in 30 to 60 days9

    Watch out for: Exclusive by default, and every deal it lists is exclusive with no end date.10,11

    Get matchedRead the reviewVisit Polyshares

Everyone else we reviewed

By score, with full reviews. We have no referral agreement with these companies, so we do not link out to them.

  1. #3 in our ranking

    7.1 out of 10

    Mercor

    Lists Outlook and Teams among its supported tools, and bid on the Spirit Airlines archive.12,2

    Typical payout
    Mercor does not publish a range13
    Fees
    None, Mercor says14
    Time to get paid
    By wire 2 to 4 weeks after signing15

    Watch out for: It confirmed a cyberattack in 2026, and class actions followed.16,17

    Read the review

We feature buyers that pay us a referral fee. Our scores and reviews don't change for it. How we earn. No buyer publishes prices by industry, so within each group the order is the same as in our main ranking.

What buyers value

What in Microsoft 365 buyers value

The column on the right is not legal advice: it lists what to raise with the buyer before anything is exported.

What in Microsoft 365 buyers value
DataWhy a buyer values itRaise with the buyer
Outlook mailboxes by roleClient service, negotiation and escalation in full threads.Outside parties' names, addresses and signatures.
SharePoint document librariesPolicies, SOPs, templates and their version history.Nothing specific
OneDrive working filesDrafts and models behind the final documents.Personal files saved by employees.
Shared mailboxes (support@, ops@)High-volume, repeated workflows with outcomes.Nothing specific
Calendar and meeting notesHow work is coordinated across a team.Personal appointments and attendee details.

Process

How it works with each buyer

In each buyer's own published words. Where a buyer publishes nothing, we say so rather than guess.

micro1

What it buys
Internal docs, SOPs and playbooks, knowledge bases, project management workflows, internal comms, templates, CRM and workflow metadata, task histories3
Who qualifies
30 to 200 employees18
Offer range
$100K-$2M+ per data package; over $1M for unique data4
Personal data
PII removed "when relevant"5
Ownership
The company keeps ownership of its data and reviews samples before release19
Time to payment
Not published

Polyshares

What it buys
Slack, email, Drive, CRM, tickets, design files, calls and ERP6
Offer range
$100K-$2M+7
Personal data
A third-party PII partner scrubs data before it is licensed20
Excluded data
Data held on behalf of clients is excluded21
Fees
Charges sellers no fee8
Time to offer and payment
Offer 1-2 weeks after intake; paid Net 30-609

Mercor

What it buys
Slack, Teams, Gmail, Outlook, Confluence, Salesforce, GitHub, Drive, Notion and 100+ other tools12
Who qualifies
Not published
Offer range
Not published13
Fees
No fees14
Security
SOC 2 Type II22
Time to payment
Wire 2-4 weeks after signing15

FAQ

Microsoft 365 data: questions, answered

  • Yes. Mercor lists Outlook among the tools it buys data from, and Polyshares buys email. The largest operating-company archive reported, Spirit Airlines', held about 100M emails and drew a $10M bid from Google.12,6,1,2

  • Buyers do not publish that. micro1 says it looks for workflows employees execute repeatedly, and a shared support or operations mailbox is often exactly that, with fewer personal messages mixed in.23

  • You can offer that. SOPs, playbooks, templates and knowledge bases lead micro1's list of wanted data, and a document-only package keeps outside parties' email out.3

  • It depends on the buyer. Polyshares says a third-party partner scrubs it before licensing; micro1 says PII is removed when relevant. Ask for the method in writing.20,5

  • Offers usually come within a few days to two weeks: Ventra cites 3 to 7 days and Polyshares 1-2 weeks after intake. Payment then takes weeks, from Mercor's 2-4 weeks to the 30-60 days Your Data Value describes.24,9,15,25

  • We do not answer legal questions. Ask the licensing company: their team reviews this with you before anything is signed.

Before you sign

Legal questions go to the licensing company

We do not answer legal questions. Ask the licensing company before you sign: their team reviews these with you.

Questions for this kind of business

  • Which export method will you use, and does our Microsoft agreement allow it?
  • Are mailboxes under a litigation hold or retention policy excluded?
  • How are outside parties' details removed, and who verifies it?

Questions for any buyer

  • Is the license exclusive, and for how long?
  • Can you sublicense the data, and to whom?
  • Which AI labs will receive it, and will you tell us?
  • How long do you keep it, and how is it deleted?
  • What is your liability cap, and who indemnifies whom?
  • Will the contract ban re-identification of people in the data?
  • Who removes personal data, by what method, and do we approve it first?

How this page was made

Every figure comes from a published source listed below, each with the date we checked it. Buyer statements are the buyer's own claims and are marked so in the source list. Firm counts come from the US Census Bureau's Statistics of US Businesses. Anything marked as our estimate is ours, not a buyer quote.

Drafted with AI assistance from our research files, then checked against each source. Reviewed 14 Oct 2026. Last updated 14 Oct 2026.

We feature companies that pay us a referral fee. Our scores and reviews don't change for it. See how we earn and how we rank. This site does not give legal, tax or financial advice.

Sources (25)

  1. 1.iTnews. Accessed 14 Oct 2026.
  2. 2.Bloomberg Law, published 17 Aug 2026. Accessed 14 Oct 2026.
  3. 3.micro1 Enterprise Data Partnership page. Accessed 14 Oct 2026. Company's own claim.
  4. 4.micro1 company referral page. Accessed 14 Oct 2026. Company's own claim.
  5. 5.beri.net, published 10 Oct 2026. Accessed 14 Oct 2026.
  6. 6.Polyshares website. Accessed 14 Oct 2026. Company's own claim.
  7. 7.Polyshares website. Accessed 14 Oct 2026. Company's own claim.
  8. 8.Polyshares website. Accessed 14 Oct 2026. Company's own claim.
  9. 9.Polyshares website. Accessed 14 Oct 2026. Company's own claim.
  10. 10.Polyshares data handling page. Accessed 14 Oct 2026. Company's own claim.
  11. 11.Polyshares track record page. Accessed 14 Oct 2026. Company's own claim.
  12. 12.Mercor Data page. Accessed 14 Oct 2026. Company's own claim.
  13. 13.Mercor Data page. Accessed 14 Oct 2026. Company's own claim.
  14. 14.Mercor Data page. Accessed 14 Oct 2026. Company's own claim.
  15. 15.Mercor Data page. Accessed 14 Oct 2026. Company's own claim.
  16. 16.TechCrunch, published 31 Mar 2026. Accessed 14 Oct 2026.
  17. 17.HR Dive, published 13 Apr 2026. Accessed 14 Oct 2026.
  18. 18.micro1 Enterprise Data Partnership page. Accessed 14 Oct 2026. Company's own claim.
  19. 19.beri.net, published 10 Oct 2026. Accessed 14 Oct 2026.
  20. 20.Polyshares website. Accessed 14 Oct 2026. Company's own claim.
  21. 21.Polyshares website. Accessed 14 Oct 2026. Company's own claim.
  22. 22.Mercor Data page. Accessed 14 Oct 2026. Company's own claim.
  23. 23.micro1 Enterprise Data Partnership page. Accessed 14 Oct 2026. Company's own claim.
  24. 24.Ventra company data page. Accessed 14 Oct 2026. Company's own claim.
  25. 25.Your Data Value website. Accessed 14 Oct 2026. Company's own claim.