Switching Salesforce Document Tools: Migration Guide With Zero Downtime (2026)
Switching Salesforce document tools — migrating from Conga or another incumbent to a new app — is one of those projects teams put off because they fear disruption. The fear is understandable but misplaced: with the right approach, you can move without a single hour of downtime, because the new tool runs alongside the old one until you’re certain it’s ready.
The secret is parallel running. Instead of ripping out the incumbent and hoping the replacement works, you install both in the same org, rebuild and validate templates in the new tool while the old one keeps producing documents, and only cut over once the output matches exactly. Nobody ever loses the ability to generate a document.
This guide walks through the full zero-downtime migration, template mapping, and the risks to watch. If you’re still deciding what to switch to, start with our 12-point buyer’s checklist.
Why parallel running means zero downtime
Zero-downtime migration is achieved by installing the new tool alongside the existing one and running both in parallel, rather than replacing the old tool before the new one is ready. Users keep generating documents with the incumbent while templates are rebuilt and validated in the new tool.
Because Salesforce lets multiple document tools coexist in one org, there is no forced switchover moment. The old tool remains fully operational throughout migration. Only after the new tool is confirmed to match — document by document — does the team cut over. If anything looks wrong during validation, you simply keep using the incumbent and fix the new setup, with zero impact on the business.
The five-step zero-downtime migration
A safe switch follows five steps: inventory, install alongside, rebuild templates, run in parallel and validate, then cut over. Each step protects the one before it, so nothing goes live until it has been proven to match.
Inventory your current templates and processes
Catalogue every template, merge field, conditional rule, and automation your current tool drives — including which flows, buttons, and processes trigger it. This inventory is the single most important step; a template missed here is a document that breaks after cutover.
Install the new tool alongside the old one
Install the replacement in the same org without removing the incumbent. Both tools now coexist, so users continue generating documents with the old tool while you build in the new one.
Rebuild and map templates
Recreate each template in the new tool, mapping merge fields and conditional logic to the new syntax. Prioritise the highest-volume documents first so the biggest wins land early and get the most validation time.
Run both tools in parallel and validate
Generate the same document from both tools using the same records and compare output side by side. Confirm the new tool matches on content, formatting, conditional sections, and pagination before anyone relies on it.
Cut over and decommission the old tool
Once validation passes, switch users and automation to the new tool. Keep the old tool installed for a short safety window, then decommission it. Historical documents already stored on records are untouched throughout.
Read more: Salesforce Document Generation Cost: The True Total Cost of Ownership (2026)
Migrating templates from Conga (or any tool)
Migrating templates means recreating each one in the new tool and mapping its merge fields and conditional logic to the new syntax — not copying files directly, because template formats differ between vendors. Treat it as a rebuild guided by your inventory, not a file transfer.
Start with the highest-volume templates, since they carry the most value and deserve the most validation. For each one, map the merge fields to the new tool’s field references and translate conditional rules into the new tool’s IF/THEN syntax. Then validate by generating the same document from both tools and comparing output.
Merge fields
Map each field reference to the new tool’s syntax, including related-record traversal. See our merge fields guide.
Conditional logic
Rebuild show/hide rules in the new tool’s IF/THEN format. See our conditional logic guide.
Formatting & layout
Recreate branding, tables, and layout, then compare pagination against the original to catch reflow differences.
Triggers & automation
Repoint the flows, buttons, and processes that launched the old tool so they call the new one after cutover.
A native tool often simplifies migration because there’s no external integration to rebuild — the triggers stay inside Salesforce. See why in our native vs third-party comparison.
The risks — and how to avoid them
The biggest risk is cutting over before the new tool is validated, which can send incorrect documents to customers; the second is missing a template or automation during inventory. Both are avoidable with discipline.
| Risk | How to avoid it |
|---|---|
| Cutting over too early | Validate every template in parallel before switching users |
| Missing a template or trigger | Complete a thorough inventory as step one |
| Conditional logic drifts | Test both true and false cases for every condition |
| Formatting / pagination changes | Compare output side by side, not just content |
| Broken automation after cutover | Repoint and test every flow and button before go-live |
Never decommission the old tool on the same day you cut over. Keep it installed for a short safety window after go-live so you can fall back instantly if an edge case surfaces. Remove it only once the new tool has run clean in production.
A realistic migration timeline
Timelines depend on template count and logic complexity, but because the old and new tools run in parallel, the timeline never creates downtime. You can move at a pace that protects quality rather than rushing.
| Org size | Typical templates | Rough timeline |
|---|---|---|
| Small | A handful | Days |
| Mid-market | 10–25 | 1–2 weeks |
| Enterprise | Dozens, heavy logic | A few weeks |
Frequently asked questions about switching Salesforce document tools
Switching Salesforce document tools does not have to mean disruption. Install the new tool alongside the old, rebuild and validate templates in parallel, and cut over only when the output matches exactly. Done this way, migration carries zero downtime and minimal risk — and your historical documents stay untouched throughout.
See how a native tool installs alongside your current one in Dochly document generation, or make sure you’re switching to the right tool with our 12-point buyer’s checklist.
