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Data warehouse ⇄ Business productivity

AWS S3 to Microsoft 365 integration — real-time, two-way sync

Keep AWS S3 and Microsoft 365 in sync without custom scripts. Cut weeks of integration work, eliminate silent data drift, and give your team a single, reliable source of truth.

  • SOC 2 and 6 other compliance frameworks
  • POC with real engineers in minutes

Adopted by fast-scaling companies moving mission-critical data in real time

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Why teams connect AWS S3 and Microsoft 365

Get the data locked inside Microsoft 365 into AWS S3 as live tables, and send results back where Microsoft 365 can use them, without writing a pipeline.

Whatever Microsoft 365 is used for, it accumulates data the rest of the company wants to analyze, and that data usually sits behind an API rather than in the warehouse. Building and babysitting an extraction pipeline is the tax most teams pay for it.

Stacksync syncs SharePoint Sites & Lists, Teams, Planner & To Do Tasks, Users from Microsoft 365 into tables in AWS S3 continuously, handling schema, rate limits, and retries. Because the sync is bi-directional, results computed in AWS S3 can also be written back into fields in Microsoft 365 where the tool can use them.

Common use cases

  • Keep CRM contacts and Microsoft 365 contacts aligned in both directions.
  • Sync employee records from an HR system into Entra ID users and group memberships.
  • Trigger incremental sync runs from S3 event notifications when new files land in a prefix.
  • Stage bulk loads for warehouses that ingest from object storage.

Cross-tool reporting

Combine Microsoft 365's data with data from every other synced system to answer questions no single tool can.

Where Microsoft 365 accepts updates: operational write-back

Segments, scores, or reference values computed in AWS S3 sync back onto records in Microsoft 365, putting analysis where the work happens.

History that outlives the tool

A continuously synced copy in AWS S3 preserves a queryable record even as data ages out of Microsoft 365 or gets changed inside it.

What you can sync between AWS S3 and Microsoft 365

Representative objects on each side — any object or custom field can map to any target. Schemas are auto-detected; types are converted between the two systems.

AWS S3 objects Microsoft 365 objects
Object Versions Prior copies retained when versioning is enabled, relevant for reprocessing. Teams Team and membership data provisioned from upstream systems.
Event Notifications Notifications on object creation or deletion that trigger incremental processing. Planner & To Do Tasks Task items synced with project and work-management tools.
Access Points Scoped network endpoints used to grant a sync narrow access to a bucket. Users Entra ID user accounts synced with HR and identity systems.
Multipart Uploads The mechanism used to write large export files reliably. Groups Microsoft 365 and security groups kept aligned with org structure and access rules.
Buckets Top-level containers a sync targets; region and policy are set at this level. Mail Messages Exchange Online messages read for logging, archiving, or activity capture.
Objects The stored files (CSV, JSON, Parquet); syncs read them as datasets or write exports into them. Calendar Events Events synced with scheduling tools and CRMs for meeting visibility.
What ships with AWS S3 ⇄ Microsoft 365

Connect AWS S3 and Microsoft 365 for flexible, real-time data sync.

Real-time sync, workflow automation, event queues, EDI, and monitoring, for every AWS S3–Microsoft 365 connection.

Real-time

Two-way sync

Changes in AWS S3 or Microsoft 365 instantly reflect in both systems. No stale data, no manual imports.

No-code + pro-code

Workflow automation

Trigger automated workflows whenever AWS S3 or Microsoft 365 data changes, update records, fire webhooks, or kick off sequences without brittle API scripts.

At scale

Event queues

Handle millions of events per minute without losing a single AWS S3 or Microsoft 365 record.

Observability

Monitoring

Track your AWS S3 ⇄ Microsoft 365 sync health, view errors, and replay failed events in one click.

Trading partners

EDI

Transform legacy EDI complexity into simple database interactions between AWS S3 and Microsoft 365.

How the AWS S3 and Microsoft 365 connectors work

AWS S3

Integration surface
REST API (the S3 API), accessed directly or through AWS SDKs
Authentication
AWS IAM credentials with SigV4 signing; commonly a role scoped to specific buckets and prefixes
Change detection
S3 Event Notifications on object create/delete delivered to SQS, SNS, Lambda, or EventBridge; list-based polling as a fallback
Capabilities
read · write · webhooks
Rate limits
Request throughput scales per prefix; sustained high-volume workloads should spread keys across prefixes

Microsoft 365

Integration surface
REST API (Microsoft Graph)
Authentication
OAuth 2.0 via Microsoft Entra ID, with delegated or application permissions
Change detection
Graph change notifications (webhooks) plus delta queries for incremental sync
Capabilities
read · write · webhooks
How it works

How to connect AWS S3 to Microsoft 365 — three steps, no code

Configure and sync within minutes, no code. Whether you sync 50k or 100M+ records, Stacksync handles the queues, infra, and plumbing. Integrations are non-invasive and need zero setup on your systems.

  1. 01

    Connect your apps

    Authenticate AWS S3 and Microsoft 365 with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.

    • OAuth 2.0
    • SSH tunnel
    • VPC peering
    AWS S3 connected
    Microsoft 365 connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the AWS S3 and Microsoft 365 objects to sync — Stacksync auto-detects both schemas, including custom fields where the platform exposes them. Sync to existing tables, or let Stacksync create new ones with ideal data types.

    • Standard objects
    • Custom objects
    • Auto-schema
    objects · AWS S3 ⇄ Microsoft 365
    Customers 12,480
    Sales Orders 8,213
    Invoices 5,902
    Items 1,344
  3. 03

    Map fields

    Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.

    • Auto-map
    • Type casting
    • Transforms
    AWS S3 Microsoft 365
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
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FAQ

AWS S3 and Microsoft 365 integration FAQ

SECURITY

Security teams love Stacksync

As a data company, we understand the importance of keeping your data secure. Stacksync is built with security best practices to keep your data safe at every layer, and is DPF-certified for US, EU, UK and CH data transfers.

Learn more about security
SOC 2 type II
ISO 27001
HIPAA BAA
GDPR
CCPA
CSA STAR
DPF US-EU-UK-CH
→ SECURITY WITH BENEFITS

SSO & SCIM

Let your users access Stacksync from your centralized user management systems. Works with Okta, Azure, Google SSO and more.

Alerts

Immediately get alerted about record syncing issues over email, Slack, PagerDuty and WhatsApp. Resolve issues from a centralized dashboard with retry and revert options.

Secure connection options

Securely connects to your systems with:

OAuth 2 SSH Tunnelling SSL certificates IP Whitelisting VPN gateway VPC peering and more

Related integrations

Every pair below is a real-time, two-way sync. Search all 386 integrations available for AWS S3 and Microsoft 365.

Popular · 8 of 386
All AWS S3 integrations All Microsoft 365 integrations Browse all integrations
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