CRM migration
Field-level mapping, validation, and rollback between OneAdvanced Legal and HighLevel. We move data and schema; workflows are rebuilt natively in HighLevel.
OneAdvanced Legal
Source
HighLevel
Destination
Compatibility
12 of 12
objects map 1:1 between OneAdvanced Legal and HighLevel.
Complexity
BStandard
Timeline
5–10 business days
Overview
OneAdvanced Legal structures its data around clients, matters, and a full legal-accounts ledger — including SAR-compliant trust accounting and per-fee-earner time recording. HighLevel models everything as Contacts, Companies, Opportunities (pipelines), and custom objects, with no native legal billing or time-tracking constructs. FlitStack AI begins by auditing your OneAdvanced export capabilities (CSV, API, or manual extract) and builds a custom-object schema in HighLevel to receive time-entry records and matter-specific custom fields. We map every OneAdvanced client to a HighLevel Company, every primary contact to a HighLevel Contact, and every matter to a HighLevel Opportunity — using custom fields (Matter_Reference__c, Billing_Type__c, Fee_Earner__c) to carry the legal context that HighLevel's standard objects cannot hold natively. SAR-compliant ledgers and trust-accounting records have no HighLevel equivalent; we export those as PDF snapshots and attach them to the relevant contact and matter records for reference. Workflows, automated document-generation rules, and compliance-check logic built in OneAdvanced do not migrate — we deliver a workflow map export as a rebuild reference for HighLevel's Automation Builder. The migration runs via HighLevel's bulk API with batched upserts at 100 records per 10-second window, staying within the 200,000-request daily limit.
Every standard and custom field arrives verified.
AI proposes the map; you confirm before any record moves.
Parent–child, lookups, and ownership stay linked.
Calls, emails, meetings — with original timestamps.
Documents, uploads, and inline notes move with the record.
Why teams make this switch
Leaving
What's pushing teams away
Choosing
What's pulling them in
Object mapping
Each row shows how a OneAdvanced Legal object lands in HighLevel, including any object-level transformations, lookup resolution, or schema-design dependencies.
Typical mapping — final map is confirmed during the sample migration step.
OneAdvanced Legal
Client / Firm
HighLevel
Company
1:1OneAdvanced client records map 1:1 to HighLevel Companies. Client reference numbers, firm names, and industry designation (legal services) carry over as custom fields. Billing-address and registered-office addresses map to the Company address fields. Industry classification is set to 'Legal Services' as the default sector, and any additional office locations are stored as tags on the Company record for reference.
OneAdvanced Legal
Contact / Person
HighLevel
Contact
1:1OneAdvanced contact records (client representatives, opposing parties, intermediaries) map to HighLevel Contacts. Each contact is linked to the Company record via the contact's primary client association. Email, phone, and role fields carry over directly. Contact priority or importance ratings from OneAdvanced are preserved as a custom dropdown field, and any contact-specific billing instructions are held as a custom text field on the Contact record.
OneAdvanced Legal
Matter / Case
HighLevel
Opportunity
1:1Each OneAdvanced matter becomes a HighLevel Opportunity. The matter reference number, matter type (e.g., conveyancing, family law, litigation), and billing type (fixed fee, hourly, CFA) migrate as custom fields (Matter_Reference__c, Matter_Type__c, Billing_Type__c). HighLevel pipelines and stages are configured to mirror the matter lifecycle stages used in OneAdvanced.
OneAdvanced Legal
Time Entry
HighLevel
Custom Object: Billable_Hours__c
1:1OneAdvanced Time Capture records have no HighLevel equivalent. FlitStack creates a Billable_Hours__c custom object with fields for duration, date, description, billing_status, and fee_earner, linked to both the Contact and the Opportunity (matter). Each time entry becomes a separate custom object record.
OneAdvanced Legal
Bill / Invoice
HighLevel
Contact / Opportunity attachment (PDF)
1:1OneAdvanced legal invoices carry SAR-compliant line items, disbursements, and VAT calculations. HighLevel has no accounting ledger. We export each bill as a PDF and attach it to the related Contact and Opportunity record. The total billed amount and outstanding balance are stored as custom fields for reference.
OneAdvanced Legal
Trust Account / Client Ledger
HighLevel
Contact / Opportunity attachment (PDF) + custom fields
1:1SAR-compliant trust ledgers and client money records cannot map to any HighLevel standard object. We generate a full PDF ledger export per client, attach it to the Contact record, and store a Trust_Account_Status__c custom field indicating the last reconciled balance and date.
OneAdvanced Legal
Document / File
HighLevel
Contact / Opportunity File attachment
1:1OneAdvanced document records (pdfDocs integration) are downloaded and re-uploaded to HighLevel Files attached to the relevant Contact or Opportunity. The original folder hierarchy and document-type metadata are preserved as a custom field (Document_Type__c) and as part of the file name.
OneAdvanced Legal
Fee Earner / Staff
HighLevel
User
1:1OneAdvanced fee-earner and staff accounts are matched to HighLevel users by email address. Unmatched staff are flagged before migration; the team either creates HighLevel accounts first or assigns records to a fallback user. Role and department information maps as Tags on the User record.
OneAdvanced Legal
Matter Type
HighLevel
Custom field: Matter_Type__c (dropdown)
1:1OneAdvanced matter types (e.g., Conveyancing, Private Client, Litigation, Corporate) map to a Matter_Type__c dropdown on the Opportunity. Each pick-list value is created in HighLevel to match the source taxonomy before data lands. Matter types determine which pipeline stages are available for each opportunity. Inactive or archived matter types from OneAdvanced are flagged but only created in HighLevel if they appear on open matters.
OneAdvanced Legal
Custom Fields
HighLevel
Custom fields on Contact, Company, Opportunity, and custom objects
1:1OneAdvanced custom fields on any object are audited during discovery. Text fields become text, numbers become number, dates become date, and pick-lists become HighLevel dropdown fields. All custom fields are pre-created in HighLevel before the migration run to avoid field-missing errors.
OneAdvanced Legal
Workflows / Automated Rules
HighLevel
Not migrated
1:1OneAdvanced workflow rules governing document generation, compliance checks, matter-stage transitions, and billing automation do not migrate. We export a JSON workflow map describing each rule's trigger, conditions, and actions as a reference for rebuilding in HighLevel's Automation Builder. The JSON includes the original OneAdvanced rule names and IDs so your team can cross-reference against current documentation.
OneAdvanced Legal
Report / Dashboard
HighLevel
Not migrated
1:1OneAdvanced OverVu financial dashboards and billable-hour realization reports have no HighLevel equivalent. The underlying data (time entries, bill amounts, matter stages) migrates into custom fields and custom objects, so reports can be rebuilt in HighLevel's reporting module. Billable-hour totals are aggregated into summary custom fields on each Opportunity for quick reference in dashboards.
| OneAdvanced Legal | HighLevel | Compatibility | |
|---|---|---|---|
| Client / Firm | Company1:1 | Fully supported | |
| Contact / Person | Contact1:1 | Fully supported | |
| Matter / Case | Opportunity1:1 | Fully supported | |
| Time Entry | Custom Object: Billable_Hours__c1:1 | Fully supported | |
| Bill / Invoice | Contact / Opportunity attachment (PDF)1:1 | Fully supported | |
| Trust Account / Client Ledger | Contact / Opportunity attachment (PDF) + custom fields1:1 | Fully supported | |
| Document / File | Contact / Opportunity File attachment1:1 | Fully supported | |
| Fee Earner / Staff | User1:1 | Fully supported | |
| Matter Type | Custom field: Matter_Type__c (dropdown)1:1 | Fully supported | |
| Custom Fields | Custom fields on Contact, Company, Opportunity, and custom objects1:1 | Fully supported | |
| Workflows / Automated Rules | Not migrated1:1 | Fully supported | |
| Report / Dashboard | Not migrated1:1 | Fully supported |
Gotchas + challenges
Platform-specific issues from each side, plus the pair-specific challenges that don't show up on either platform's page on its own.
OneAdvanced Legal gotchas
Limited public API documentation complicates automated extraction
Trust account transaction sequencing risk at cutover
Custom properties and bespoke workflows are not visible in standard exports
National Will Register data sits outside the main platform
HighLevel gotchas
Sub-account architecture creates isolated data silos per client
Usage-based telecom and AI costs are not in the subscription price
Workflows have no native equivalent in most destination CRMs
API rate limits cap bulk migration throughput at 100 requests per 10 seconds per sub-account
White-label configuration and branding assets do not export via API
Pair-specific challenges
Migration approach
Discovery and schema planning
FlitStack audits your OneAdvanced Legal data model, identifies available export mechanisms (CSV export, direct API access, or manual extract), and catalogs every custom field, matter type, and time-entry format. We then design the HighLevel custom-object schema — creating the Billable_Hours__c custom object with all required fields, defining pipeline stages to match your matter lifecycle, and mapping custom fields and pick-list values. This phase produces a migration plan document that your HighLevel admin reviews and approves before any data moves.
Document archive extraction and time-entry export
For each matter, FlitStack extracts the full document archive from OneAdvanced (pdfDocs integration storage) and packages files with matter reference prefixes. Simultaneously, time-entry records are exported from OneAdvanced Time Capture — each record includes entry date, duration, fee earner email, matter reference, and billing status. Client ledger and trust-account data is exported as PDF snapshots per client. Fee-earner and staff accounts are exported for email-matching against HighLevel users, with unmatched accounts flagged for resolution.
Test migration with field-level verification
A representative slice of records — typically 200–500 covering contacts, companies, matters, time entries, and documents — migrates first. FlitStack generates a field-level diff comparing the OneAdvanced source values against what landed in HighLevel. You verify that matter types map correctly to the Matter_Type__c dropdown, that time entries link to the right Contact and Opportunity, and that document attachments appear on the correct records. Any mapping errors are corrected before the full run commits. This step typically takes one to two business days.
Full migration run with delta-pickup window
The full dataset migrates in batched API calls at HighLevel's rate-limit pace (100 records per 10-second window). A delta-pickup window of 24–48 hours runs after the primary run completes, capturing any matters opened or time entries logged in OneAdvanced during the cutover. FlitStack generates an audit log of every record created or updated, with source-system IDs preserved on each HighLevel record for traceability. One-click rollback reverts all migrated records if reconciliation finds critical discrepancies. Your team continues working in OneAdvanced throughout — the migration uses scoped read access only and does not lock or modify your live OneAdvanced account.
Post-migration reconciliation and workflow rebuild handoff
FlitStack delivers a reconciliation report comparing record counts, field-population rates, and attachment completeness between the source and destination. Trust-account PDF exports are verified against their attached Contact records. The workflow-definition JSON export is handed off to your HighLevel admin with a field-mapping reference guide for rebuilding OneAdvanced workflows in HighLevel's Automation Builder. FlitStack is available for a 30-day post-migration support window to address any data discrepancies discovered after go-live.
Platform deep dives
OneAdvanced Legal
Source
Strengths
Weaknesses
HighLevel
Destination
Strengths
Weaknesses
Complexity grading
Standard CRM migration. 1 of 8 objects need a mapping; the rest are 1:1.
Overall complexity
Standard migration
Derived from compatibility, mapping clarity, API constraints, and data volume across OneAdvanced Legal and HighLevel.
Object compatibility
1 of 8 objects need a mapping; the rest are 1:1.
Field mapping clarity
Field mapping is derived from defaults — final spec confirmed during the sample migration.
Timeline complexity
8-object category — typical timelines run 2–7 days end-to-end.
API constraints
OneAdvanced Legal: Not publicly documented.
Data volume sensitivity
OneAdvanced Legal doesn't expose a bulk API — REST + parallelization used for high-volume runs.
Estimator
Rule-based pricing — no per-record fees, no manual quotes. Migrations over 2M records are scoped individually.
Step 1
Pick a category, then your source and destination platforms.
Category
FAQ
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