Integrations that connect your ERP and CRM

A won opportunity exists in your CRM, but an administrator has to create the order again in your ERP. Customer identifiers, the accepted quotation and the scope of work all need to match. An integration can handle this handover if both systems provide the necessary data and access.

Start with one specific handover. Record its trigger, frequency, participants and the corrections it currently requires. Information transferred once a year calls for a different approach from an order handled by several people every day. A controlled export may be sufficient for occasional transfers. An existing standard integration also deserves an initial assessment against your actual requirements.

Our focus is on data flows involving customers, quotations, orders and operational work. We assess compatibility using the products' documentation, access conditions and versions. The existence of an API does not establish whether it supports every action you need.

Assign clear responsibility for each area of data. Your CRM might own contacts and sales activities, while your ERP assigns order numbers and processing status. The right arrangement depends on your workflow. Decide where each value can be changed and where that change should be sent.

A field mapping connects source and destination fields. It also records data types, required values, allowed options and rules for missing information. “Customer” is not a sufficient specification: which identifier connects the same business in both systems? What should happen when one company has several billing addresses?

The example below shows why the business mapping must be settled before the transfer.

CRM input	Validation	ERP destination
Company C-104	Unique mapping available?	Customer account K-208
Quote A-031, version 2	This version approved?	Order items
Project start unknown	Does the destination require a date?	Hold the transfer if necessary

If you first need to organise customer information, our custom CRM software page explains how contacts, opportunities and handovers fit together.

For a pilot, we agree on a precise starting point, such as approval of a quotation version. The integration reads the agreed fields, checks their mappings and transfers them through the available technical interface. The result is then compared with the expected business record in the destination system.

A technical acknowledgement answers a different question from business acceptance. Is the correct customer assigned? Have quantity, unit and quotation version been preserved? Has the record reached the intended processing status? These checks belong in the test plan alongside cancellations, changes and duplicate messages.

Two-way transfers also need rules for competing changes. A value should not overwrite another value simply because it was transferred later. The precedence rule needs a business justification and an implementation that the connected systems can support.

Work after the handover remains part of your ERP process from order to invoicing. The integration transfers the agreed context; it cannot supply missing approval or processing rules.

An unavailable application and an unknown customer identifier need different responses. A limited retry may help with a temporary technical failure. Invalid business data requires a correction or a decision.

Retries also need protection against duplicate business transactions. If the destination saved an order but its response was lost, another attempt must not silently create a second order. Microsoft's Retry pattern describes this risk and the distinction between transient and persistent failures.

1. Input: Quotation version A-031/2 is ready for transfer.
2. Validation stops: The customer mapping is missing; no order is released.
3. Resolution: An assigned person confirms the mapping to K-208.
4. Controlled retry: The transaction identifier is checked, the transfer runs and the destination result is reconciled.

The operating scope should therefore include a useful failure view: the affected record, cause, last attempt and responsible person. Before launch, agree which failures can be handled automatically and which require human approval.

We establish which technical identities the connection uses, which actions they can perform and how credentials are managed. A test environment should support validation without uncontrolled changes to live records. Logging requirements should identify the information needed for troubleshooting and who may access it.

The agreed handover can include a field map, supported versions, test cases, operating instructions and a responsibility list. Identify owners for the connected systems too. Changes to their access mechanisms, fields or interfaces need to be considered when maintaining the integration.

If incoming documents first need interpretation, that is a separate processing step. An AI integration with review can be assessed for that purpose; structured records can often be transferred using explicit rules.

A suitable first scope covers one data flow, a defined record type and documented exceptions. Before implementation, we check the available documentation, test access, data quality and required update frequency. These establish the scope and assumptions for a proposal.

Effort depends on factors including accessible operations, mapping rules, transfer directions and failure handling. Setup and testing should be distinguished from ongoing operation, later changes and any charges from the connected vendors. A reliable fixed price requires those details.

For the first discussion, prepare system names and versions, an anonymised sample file and a description of the current handover. Identify who can accept the business result. This provides a basis for deciding whether an existing connection is sufficient or a custom integration is justified.