Real-time
Two-way sync
Changes in Apollo.io or Microsoft 365 instantly reflect in both systems. No stale data, no manual imports.
CRM ⇄ Business productivity
Apollo.io to Microsoft 365 integration — real-time, two-way sync
Keep Apollo.io 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
Case study
Migrated from Mulesoft
Case study
Migrated from Celigo
Migrated from Heroku Connect
Migrated from Matillion
Case study
Migrated from Fivetran
Case study
Migrated from Celigo
Why teams connect Apollo.io and Microsoft 365
Sync what happens in Microsoft 365 with the customer records in Apollo.io, in real time and in both directions.
The CRM is supposed to be the record of every customer relationship, but customer-relevant information also accumulates in the other tools a team runs. Whatever Microsoft 365 holds or produces that touches a customer, whether conversations, payments, replies, enriched data, or notes, the CRM only benefits if it arrives without someone copying it over.
Stacksync connects Mail Messages, Calendar Events, Contacts, OneDrive Files (driveItems) in Microsoft 365 to Contacts, Accounts, People (database records), Sequences in Apollo.io with bi-directional, real-time sync. Activity and record changes in Microsoft 365 update the matching contact or account in Apollo.io, and CRM data flows the other way wherever Microsoft 365 can store and use it.
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.
- Deduplicate contacts across Apollo and the CRM by syncing on email as the match key.
- Push CRM opportunity stages back into Apollo so reps see pipeline context while sequencing.
Where Microsoft 365 can store CRM context: fields kept current
Owner, lifecycle stage, or account details from Apollo.io sync into Microsoft 365, so people working there have the context without switching tools.
Where Microsoft 365 supplies contact or company data
Enriched fields land directly on records in Apollo.io, and refreshes keep them from going stale.
Where Microsoft 365 processes payments
Charges, refunds, and subscription changes appear on the account in Apollo.io, so revenue context lives with the relationship.
What you can sync between Apollo.io 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.
| Apollo.io objects | Microsoft 365 objects | |
|---|---|---|
| Accounts Company records with firmographic attributes, matched to CRM accounts during sync. | Mail Messages Exchange Online messages read for logging, archiving, or activity capture. | |
| People (database records) Prospects from Apollo's global database, pulled into downstream systems once enriched or saved. | Calendar Events Events synced with scheduling tools and CRMs for meeting visibility. | |
| Sequences Outreach cadences (emailer campaigns in the API); enrollment status is read to track which contacts are being worked. | Contacts Personal and org contacts kept consistent with CRM contact records. | |
| Deals (Opportunities) Pipeline records that can be read and written to keep Apollo aligned with the CRM of record. | OneDrive Files (driveItems) File and folder metadata synced for document workflows and audits. | |
| Tasks and calls Rep activity records synced for activity reporting and coaching workflows. | SharePoint Sites & Lists List items read and written like lightweight database tables. | |
| Custom fields Account- and contact-level custom attributes mapped field-by-field in a sync. | Teams Team and membership data provisioned from upstream systems. |
What ships with Apollo.io ⇄ Microsoft 365
Connect Apollo.io and Microsoft 365 for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Apollo.io–Microsoft 365 connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Apollo.io 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 Apollo.io or Microsoft 365 record.
Observability
Monitoring
Track your Apollo.io ⇄ 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 Apollo.io and Microsoft 365.
How the Apollo.io and Microsoft 365 connectors work
Apollo.io
- Integration surface
- REST API
- Authentication
- API key (passed in request headers); master keys unlock account-wide endpoints
- Change detection
- Polling on updated-at timestamps; webhook callbacks exist only for delivering asynchronous enrichment results, not as a general change-event stream
- Capabilities
- read · write
- Rate limits
- Rate limits and enrichment credits vary by plan; bulk endpoints are throttled separately from single-record calls
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 Apollo.io 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 Apollo.io 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.
Apollo.io
connected
Microsoft 365
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Apollo.io 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 · Apollo.io ⇄ 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.
Apollo.io Microsoft 365Company company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Apollo.io and Microsoft 365 integration FAQ
-
Yes. Stacksync provides a managed, real-time two-way integration between Apollo.io and Microsoft 365: authenticate both systems, choose the objects to sync (such as Apollo.io's Accounts and People (database records)), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Change detection on Apollo.io: Polling on updated-at timestamps; webhook callbacks exist only for delivering asynchronous enrichment results, not as a general change-event stream. On Microsoft 365: Graph change notifications (webhooks) plus delta queries for incremental sync. Each detected change propagates to the other side in milliseconds, with field-level conflict resolution and an inspectable event log.
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On the Microsoft 365 side: Mail Messages, Calendar Events, Contacts, OneDrive Files (driveItems), plus custom fields where Microsoft 365 exposes them. On the Apollo.io side: Contacts, Accounts, People (database records), Sequences. 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 Apollo.io and Microsoft 365: Where Microsoft 365 can store CRM context: fields kept current; Where Microsoft 365 supplies contact or company data; Where Microsoft 365 processes payments. Owner, lifecycle stage, or account details from Apollo.io sync into Microsoft 365, so people working there have the context without switching tools.
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Apollo.io: REST API. Authentication: API key (passed in request headers); master keys unlock account-wide endpoints. 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.
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.
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:
Related integrations
Every pair below is a real-time, two-way sync. Search all 386 integrations available for Apollo.io and Microsoft 365.
Popular · 8 of 386
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Apollo.io ⇄ Google Sheets -
Apollo.io ⇄ Klaviyo -
Apollo.io ⇄ Lemlist -
Apollo.io ⇄ Lusha -
Microsoft 365 ⇄ Gladly -
Microsoft 365 ⇄ Gorgias -
Microsoft 365 ⇄ Infor CRM -
Microsoft 365 ⇄ Insightly
No integrations match .
