Legacy systems & Transfer
Undocumented interface, and the former developer is unavailable?
Without documentation, it is not immediately clear which data paths can be used reliably. This concerns more than the technical address: authentication, field meaning, schedules and error handling may also be unknown. An observed process is a starting point, not yet a complete interface description.
- SourceExisting data path
- Check the connectionAccess & Define rules
- DestinationLimited connection
How this appears in daily operation
An export has run for years. Nobody knows exactly which application produces it or who processes it further. Now a new store needs to be connected. Before replacing the existing process, we record what is already there and which changes are permitted.
Distinguish typical causes
Knowledge held by a former contributor
Programming, accounts and business rules may not have been documented together.
Multiple handovers without an overview
File storage, database access and subsequent manual adjustments may interact. One file found in isolation does not explain the process.
Unknown access limitations
An existing account may see only certain data. Whether writing, reading or exporting is permitted must be explicitly clarified.
What you can check first
Collect existing information
Review approved manuals, example files, schedules and operational logs. Keep keys and passwords out of the collection.
Record the systems and people involved
Who supplies, processes and uses the result? Ask the business team about manual intermediate steps too.
Describe an observed process
Record the input, time, output and feedback of an existing run. Do not experiment with unknown write operations.
When the problem runs deeper
A possible starting point is a read-only or export-based data path with explicitly clarified permissions. Mapping, checks and delivery are planned afterwards. Where a modern API exists, an OpenAPI description can help document operations, data formats and security requirements systematically.
Turn observations into a useful description
For the first agreed process, we record the source, permitted access, required fields, destination and feedback. Unresolved points remain visible. The description grows from confirmed findings, rather than assumed field names.
When the existing solution reaches its limits
A connection may initially replace a small manual workaround. If this reveals a larger issue with the data model, maintenance or operation, the next step is explicitly planned. The legacy application's existing benefits remain part of the decision.
When support makes sense
Support is useful when the data path matters to operations, responsibilities are missing or a new destination needs to be connected. An anonymized description of the existing process is enough to start.
The right solution pathTurn existing data paths into a clear connectionSources for technical assessment
Technical content reviewed on 7 October 2026. Vendor statements refer to the products named; they do not replace checking your specific configuration.
Clarify the next step together.
Your application names and a brief description of the problem are enough to start.