PI/PO Migration Part 4: Connectivity and Security for Migrated Interfaces
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Set up what PO used to provide on-premise: Cloud Connector access to back ends, certificates and keystore entries, credentials as security material, inbound authentication for senders, and network changes partners must make.
Visual overview
Explanation
📌 KEY POINTS
✅ Cloud Connector exposes on-premise systems to Cloud Integration through virtual hosts and access control.
✅ Certificates for SSL and signing are imported into the tenant keystore.
✅ Passwords and OAuth credentials are deployed as security material, referenced by name.
✅ External partners must send to new Cloud Integration endpoints with new authentication.
⚠️ Partner endpoint changes are often the longest part of a migration — start them early.
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▶ WHERE WE ARE
Part 3 mapped designs. Part 4 sets up the connectivity and security they need.
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▶ 1. REACHING ON-PREMISE SYSTEMS
Cloud Integration reaches S/4HANA, ECC and other on-premise systems through SAP Cloud Connector, installed in the customer network. Each back end is exposed as a virtual host with allowed resources (URL paths, RFC function modules). iFlows use the virtual host and the location ID.
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▶ 2. CERTIFICATES
TLS server certificates of receivers, client certificates for mutual TLS, and keys for signing or encryption are managed in the tenant's keystore. Expiry dates must be monitored; expired certificates are a top cause of integration outages.
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▶ 3. CREDENTIALS
User credentials, OAuth2 client credentials and secure parameters are deployed as security material and referenced by name in adapters, so iFlows contain no secrets and credentials can be rotated without redeploying.
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▶ 4. INBOUND AUTHENTICATION
Senders calling Cloud Integration authenticate with client certificates, OAuth tokens or basic authentication of technical users with appropriate roles. Each sender gets its own credentials so access can be revoked individually.
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▶ 5. PARTNER AND NETWORK CHANGES
External partners and internal systems previously sending to PO must change endpoints, certificates and sometimes protocols. Firewalls and allowlists need updates. Coordinating these changes, with test windows and fallbacks, often decides the migration timeline.
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▶ STEP BY STEP
- Expose a back end in Cloud Connector with restricted resources.
- Import a receiver certificate into the keystore.
- Deploy credentials as security material and reference them.
- Create a partner communication plan for endpoint changes.
✅ CHECKPOINT: migrated iFlows connect securely to back ends and partners with no secrets in iFlows.
How the SAP process fits together
SAP PROCESS EXPLORER · Integration: sender to receiver
ERPClimb.comPI/PO to Integration Suite Migration — process breakdown
Topic-specific conceptual flow: how key objects and decisions fit together. SAP configurations and exceptional cases can follow different paths.
Selected process stage
Assess
Inventory PO interfaces and run Migration Assessment
What this specific lesson teaches
Set up what PO used to provide on-premise: Cloud Connector access to back ends, certificates and keystore entries, credentials as security material, inbound authentication for senders, and network changes partners must make.
Key lesson principle: Cloud Connector exposes on-premise systems to Cloud Integration through virtual hosts and access control.
Representative SAP learning flow, not a guarantee of system runtime sequence in every scenario. The chapter-specific facts come from the published lesson text.
Real project scenario
Cutover for a wave was delayed four weeks because three banks needed new certificates and IP allowlisting for the Cloud Integration endpoints, which nobody had requested in advance. Later waves started partner communication at planning time.
Common mistakes
- Secrets in iFlow configuration.
- Unrestricted Cloud Connector access.
- No certificate expiry monitoring.
- Late partner communication.
Best practices
- Least-privilege Cloud Connector resources.
- Security material for all credentials.
- Certificate expiry alerts.
- Early partner change planning.
Interview angle
Interviewers ask how Cloud Integration connects to on-premise systems, how certificates and credentials are managed and what partner changes migration requires.
Practice this lesson
Original educational case studies for SAP consultants, not official SAP certification exam questions. Verify product edition and implementation details against the current SAP documentation.
Quick check
0 of 3 questions attempted
1. How does Cloud Integration reach an on-premise S/4HANA system?
2. Where should passwords for receiver systems be stored?
3. What often takes longest in a PO migration wave?
Interview questions
1. What connectivity and security setup does a PO-to-Cloud Integration migration require?
Answer it in your own words first, then compare.
Check before use: lesson examples are educational, not a guarantee of correctness for your SAP edition or release. Sample code has not been executed on your SAP system. Confirm API availability, syntax, authorizations and business impact in an approved development or test environment.