Real-time
Two-way sync
Changes in Amazon S3 or Microsoft 365 instantly reflect in both systems. No stale data, no manual imports.
Storage ⇄ Business productivity
Amazon S3 to Microsoft 365 integration — real-time, two-way sync
Keep Amazon 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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Migrated from MuleSoft
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Migrated from Fivetran
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Migrated from Celigo
Why teams connect Amazon S3 and Microsoft 365
Land the records and documents that build up in Microsoft 365 into Amazon S3 as they are created, and surface Amazon S3's file details on the Microsoft 365 records that point to them, without an export job to maintain.
Microsoft 365 and Amazon S3 hold different kinds of data. Microsoft 365 carries records and the activity around them — the tickets, messages, orders, or issues a team works through, often with documents attached. Amazon S3 holds files and the metadata that describes them. Where the two meet is narrow but real: much of what Microsoft 365 produces has to be kept somewhere durable, and many of the files Amazon S3 stores are the very documents Microsoft 365's records point to.
Stacksync syncs Groups, Mail Messages, Calendar Events, Contacts in Microsoft 365 with Object versions, Prefixes (folders), Multipart uploads, Buckets in Amazon S3 in real time. Records and attachments created in Microsoft 365 are written into Amazon S3 as objects or files within seconds of being created. In the other direction, the metadata Amazon S3 keeps about those files — name, location, owner, modified date — flows back onto the matching record in Microsoft 365, so people see the current document without leaving the tool. Field-level mapping controls exactly what crosses over and in which direction, so you keep a durable copy of what matters without an extract to schedule or a nightly dump that leaves the copy a day behind.
Common use cases
- 01 Sync SharePoint lists with operational databases so business users edit in SharePoint while systems read SQL.
- 02 Archive mail and file metadata into a warehouse for compliance and activity analytics.
- 03 Two-way sync Object tags with a database so retention or classification labels set in an internal app write back onto S3 objects via the tagging API without rewriting the files.
- 04 Mirror Objects under a given Bucket and prefix into another bucket, region, or a warehouse external stage for backup or downstream processing.
Common sync patterns
Where Amazon S3 holds the source documents: file details on the record
A file's name, location, owner, and modified date from Amazon S3 sync onto the matching record in Microsoft 365, so whoever is working there sees the current version without switching tools.
A copy that outlives the tool
A continuously synced copy in Amazon S3 preserves records and documents even as they age out of Microsoft 365 or get changed inside it, so history stays intact and reachable.
Feed a data lake or downstream pipeline
Structured records from Microsoft 365 land in Amazon S3 as objects a data lake, search index, or processing pipeline can read, without a custom extract to build and babysit.
What you can sync between Amazon 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.
| Amazon S3 objects | Microsoft 365 objects | How this pairing syncs | |
|---|---|---|---|
| Multipart uploads In-progress large-object uploads assembled from parts; objects above ~100 MB (required above 5 GB) are written this way, and incomplete uploads persist until completed or aborted. | Teams Team and membership data provisioned from upstream systems. | Multipart uploads is specific to Amazon S3 and Teams to Microsoft 365 — each maps to any object or custom field on the other side. | |
| Buckets Top-level, region-scoped containers that hold objects; enumerated to discover the namespaces and prefixes a sync should cover. | Planner & To Do Tasks Task items synced with project and work-management tools. | Buckets is specific to Amazon S3 and Planner & To Do Tasks to Microsoft 365 — each maps to any object or custom field on the other side. | |
| Objects Files stored under a key; content is read with GET and written with PUT, and each object's key/size/ETag/LastModified is the unit indexed into a database. | Users Entra ID user accounts synced with HR and identity systems. | Objects is specific to Amazon S3 and Users to Microsoft 365 — each maps to any object or custom field on the other side. | |
| Object metadata System metadata (Content-Type, size, ETag, LastModified) plus user-defined x-amz-meta-* headers; user metadata is fixed at write time and only changeable by rewriting the object. | Groups Microsoft 365 and security groups kept aligned with org structure and access rules. | Object metadata is specific to Amazon S3 and Groups to Microsoft 365 — each maps to any object or custom field on the other side. | |
| Object tags Up to 10 key-value tags per object, mutable in place via the tagging API independent of content, so classification and retention labels sync two-way without rewriting files. | Mail Messages Exchange Online messages read for logging, archiving, or activity capture. | Object tags is specific to Amazon S3 and Mail Messages to Microsoft 365 — each maps to any object or custom field on the other side. | |
| Object versions When bucket versioning is enabled every write creates a new version ID; prior versions and delete markers are readable for history and audit syncs. | Calendar Events Events synced with scheduling tools and CRMs for meeting visibility. | Object versions is specific to Amazon S3 and Calendar Events to Microsoft 365 — each maps to any object or custom field on the other side. |
How changes propagate between Amazon S3 and Microsoft 365
Each direction of the sync is driven by what the source system can signal and what the destination accepts — detection, delivery, and expected latency below.
Amazon S3 Microsoft 365 Sub-second propagation
DetectionAmazon S3 notifies Stacksync of record changes through webhook events. S3 Event Notifications push object-created, object-removed, and object-tagging events to SNS, SQS, Lambda, or EventBridge.
DeliveryEach detected change is written to Microsoft 365 through its API, with automatic retries and rate-limit backoff.
Microsoft 365 Amazon S3 Sub-second propagation
DetectionMicrosoft 365 notifies Stacksync of record changes through webhook events. Graph change notifications (webhooks) plus delta queries for incremental sync.
DeliveryEach detected change is written to Amazon S3 through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- Amazon S3: S3 sustains at least 3,500 PUT/COPY/POST/DELETE and 5,500 GET/HEAD requests per second per partitioned prefix and scales higher automatically; bursts can return HTTP 503 SlowDown while it repartitions.
What ships with Amazon S3 ⇄ Microsoft 365
Connect Amazon S3 and Microsoft 365 for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Amazon S3–Microsoft 365 connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Amazon 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 Amazon S3 or Microsoft 365 record.
Observability
Monitoring
Track your Amazon 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 Amazon S3 and Microsoft 365.
How the Amazon S3 and Microsoft 365 connectors work
Amazon S3
- Integration surface
- S3 REST API (also via AWS SDKs and the S3-compatible endpoint)
- Authentication
- AWS IAM credentials — an access key ID and secret access key signed with AWS Signature Version 4; supports temporary STS credentials and cross-account IAM roles
- Change detection
- S3 Event Notifications push object-created, object-removed, and object-tagging events to SNS, SQS, Lambda, or EventBridge; there is no modified-since query, so polling relies on each object's LastModified from ListObjectsV2
- Capabilities
- read · write · webhooks
- Rate limits
- S3 sustains at least 3,500 PUT/COPY/POST/DELETE and 5,500 GET/HEAD requests per second per partitioned prefix and scales higher automatically; bursts can return HTTP 503 SlowDown while it repartitions.
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 Amazon 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.
- 01
Connect your apps
Authenticate Amazon 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.
Amazon S3
connected
Microsoft 365
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Amazon 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.
objects · Amazon S3 ⇄ Microsoft 365Customers 12,480Sales Orders 8,213Invoices 5,902Items 1,344 - 03
Map fields
Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.
Amazon S3 Microsoft 365Company company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Amazon S3 and Microsoft 365 integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Amazon S3 and Microsoft 365: authenticate both systems, choose the objects to sync (such as Amazon S3's Multipart uploads and Buckets), map fields visually, and changes propagate both ways in milliseconds — no code required.
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On the Microsoft 365 side: Groups, Mail Messages, Calendar Events, Contacts, plus custom fields where Microsoft 365 exposes them. On the Amazon S3 side: Object versions, Prefixes (folders), Multipart uploads, Buckets. Stacksync auto-detects both schemas and converts types between the two systems.
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Yes. Each object mapping can be bidirectional or restricted to a single direction (both systems accept writes). Read-only mirrors, one-way pushes, and full two-way sync can be mixed in the same integration.
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Common patterns for Amazon S3 and Microsoft 365: Where Amazon S3 holds the source documents: file details on the record; A copy that outlives the tool; Feed a data lake or downstream pipeline. A file's name, location, owner, and modified date from Amazon S3 sync onto the matching record in Microsoft 365, so whoever is working there sees the current version without switching tools.
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Amazon S3: S3 REST API (also via AWS SDKs and the S3-compatible endpoint). Authentication: AWS IAM credentials — an access key ID and secret access key signed with AWS Signature Version 4; supports temporary STS credentials and cross-account IAM roles. Microsoft 365: REST API (Microsoft Graph). Authentication: OAuth 2.0 via Microsoft Entra ID, with delegated or application permissions. Stacksync manages authentication, retries, and rate limits on both sides.
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Microsoft 365: Nearly all Microsoft 365 workloads (Exchange, SharePoint, OneDrive, Teams, Entra ID) are exposed through the single Microsoft Graph endpoint rather than per-product APIs. Amazon S3: S3 provides strong read-after-write consistency for all operations, but it has no built-in change feed — near-real-time detection depends on S3 Event Notifications or EventBridge being configured on the bucket. Stacksync's field mapping accounts for these differences between Amazon S3 and Microsoft 365 without custom code.
SECURITY
Security teams trust 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.
SOC 2 Type II
ISO 27001
HIPAA BAA
GDPR
CCPA
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:
Related integrations
Every pair below is a real-time, two-way sync. Search all 446 integrations available for Amazon S3 and Microsoft 365.
Popular · 7 of 446
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Amazon S3 ⇄ SendGrid -
Amazon S3 ⇄ Twilio -
Amazon S3 ⇄ GitHub -
Amazon S3 ⇄ Atlassian -
Microsoft 365 ⇄ Sharepoint -
Microsoft 365 ⇄ Egnyte -
Microsoft 365 ⇄ Box
No integrations match .
