CRM migration

Migrate from Aderant Expert Sierra to Microsoft Dynamics 365 Sales

Field-level mapping, validation, and rollback between Aderant Expert Sierra and Microsoft Dynamics 365 Sales . We move data and schema; workflows are rebuilt natively in Microsoft Dynamics 365 Sales .

Aderant Expert Sierra logo

Aderant Expert Sierra

Source

Microsoft Dynamics 365 Sales

Destination

Microsoft Dynamics 365 Sales  logo

Compatibility

100%

12 of 12

objects map 1:1 between Aderant Expert Sierra and Microsoft Dynamics 365 Sales .

Complexity

BStandard

Timeline

3–5 days

Rollback included Accuracy guarantee Field-level validation

Overview

What this migration involves

Aderant Expert Sierra and Dynamics 365 Sales serve fundamentally different functions: Expert Sierra is a practice-management system for law firms handling client matters, billing, time tracking, and trust accounting, while Dynamics 365 Sales is a sales CRM focused on lead management, opportunity pipelines, and revenue tracking. The migration challenge is translating legal-specific constructs — matters, billing rates, time entries, and client hierarchies — into Dynamics 365's Account-Contact-Opportunity model. We extract data from Aderant via its API and database exports, transform matters into Opportunities (or custom Dataverse tables for firm-specific fields), map billing records to Invoice entities, and preserve time-entry history as Activity records. Legal workflows, billing rules, and trust accounting logic do not transfer and must be rebuilt using Dynamics 365 workflows or Power Automate. The migration carries all structured data — clients, matters, contacts, billing records, time entries, and documents — into a schema your Dynamics 365 administrator configures to match firm workflow requirements.

Field-level fidelity

Every standard and custom field arrives verified.

Schema-aware mapping

AI proposes the map; you confirm before any record moves.

Relationships preserved

Parent–child, lookups, and ownership stay linked.

Full activity history

Calls, emails, meetings — with original timestamps.

Attachments & notes

Documents, uploads, and inline notes move with the record.

Why teams make this switch

Two sides of the same decision

Leaving

Aderant Expert Sierra logo

Aderant Expert Sierra

What's pushing teams away

  • Implementation complexity and cost are significant deterrents — firms report months-long projects and substantial consulting fees, making Expert Sierra impractical for smaller or budget-constrained practices.
  • The user interface is widely described as dated and non-intuitive, creating steep onboarding curves and lower adoption rates among administrative staff and timekeepers outside the core legal team.
  • Limited modern mobility and collaboration features compared to newer cloud-native competitors, leaving firms that prioritise client portals and mobile-first workflows feeling underserved.
  • Competitors including Clio Manage and Filevine offer faster deployment timelines and lower total cost of ownership for firms that do not require the full depth of Expert Sierra's financial module.

Choosing

Microsoft Dynamics 365 Sales  logo

Microsoft Dynamics 365 Sales

What's pulling them in

  • Deep Microsoft 365, Teams, and Outlook integration makes Microsoft Dynamics 365 Sales a natural fit for Microsoft-first organizations already invested in that ecosystem
  • Sales Enterprise and Premium tiers offer unlimited custom tables and advanced AI-driven forecasting and predictive analytics not available in lower tiers
  • Professional tier pricing at $65 per user per month offers a lower entry cost than Salesforce for SMB teams with straightforward CRM needs
  • Flexible customization options allow businesses to build bespoke apps, tailor forms and views, and integrate with other Dynamics 365 modules
  • Microsoft Copilot AI tools are embedded directly into the sales workflow on Enterprise and Premium, automating routine tasks and providing deal intelligence

Object mapping

How Aderant Expert Sierra objects map to Microsoft Dynamics 365 Sales

Each row shows how a Aderant Expert Sierra object lands in Microsoft Dynamics 365 Sales , including any object-level transformations, lookup resolution, or schema-design dependencies.

Typical mapping — final map is confirmed during the sample migration step.

Aderant Expert Sierra

Client

maps to

Microsoft Dynamics 365 Sales

Account

1:1
Fully supported

Aderant clients map directly to Dynamics 365 Accounts. Client name becomes Account Name; billing address maps to Address fields. Expert Sierra clients without matter records become Accounts with no open opportunities. Parent-client hierarchies map to Parent Account lookup in Dynamics 365.

Aderant Expert Sierra

Matter

maps to

Microsoft Dynamics 365 Sales

Opportunity

1:1
Fully supported

Each Expert Sierra matter maps to a Dynamics 365 Opportunity. Matter number is stored as a custom field (Matter_Number__c) for traceability. Matter description becomes Opportunity Name; responsible attorney becomes OwnerId via email match. Matter status (open/closed/archived) drives Opportunity State and StatusCode.

Aderant Expert Sierra

Contact

maps to

Microsoft Dynamics 365 Sales

Contact

1:1
Fully supported

Aderant contact roles (responsible attorney, billing contact, referring attorney) map to Dynamics 365 Contact records. Contact name, email, phone, and address fields transfer directly. Multiple contact roles per matter create Contact-to-Opportunity associations via Opportunity Contact Role in Dynamics 365 and enable role-based reporting.

Aderant Expert Sierra

Bill/Invoice

maps to

Microsoft Dynamics 365 Sales

Invoice

1:1
Fully supported

Aderant billing records become Dynamics 365 Invoice entities linked to the mapped Opportunity. Invoice number and invoice date map directly; billing amount becomes Invoice Total. Line items from Expert Sierra invoice details map to InvoiceDetail records in Dynamics 365 and preserve original billing period details.

Aderant Expert Sierra

Time Entry

maps to

Microsoft Dynamics 365 Sales

Task / Custom Activity

1:1
Fully supported

Time entries attach to the mapped Matter-Opportunity. Original entry date, hours worked, description, and billing rate are preserved as custom fields on a TimeEntry__c Dataverse table. Attorney attribution stored via OwnerId. Billable vs. non-billable status maps to a custom picklist.

Aderant Expert Sierra

Expense Entry

maps to

Microsoft Dynamics 365 Sales

Custom Expense Entity

1:1
Fully supported

Expense records require a custom Dataverse table (Expense__c) since Dynamics 365 has no native expense entity. Fields include expense date, amount, category, description, and matter link (Opportunity lookup). Expense status (submitted/approved/paid) maps to a custom picklist and supports expense reporting workflows.

Aderant Expert Sierra

Document / File Attachment

maps to

Microsoft Dynamics 365 Sales

SharePoint / Notes

1:1
Fully supported

Expert Sierra documents attached to matters are exported and re-uploaded to Dynamics 365 SharePoint integration or stored as Notes with file attachments. Document name and original upload date are preserved. Large document volumes may require SharePoint document library mapping for compliance.

Aderant Expert Sierra

Trust Account

maps to

Microsoft Dynamics 365 Sales

Custom Financial Entity

1:1
Fully supported

Trust account records have no direct Dynamics 365 equivalent. We create a TrustAccount__c custom Dataverse table capturing trust balance, client link (Account lookup), matter link (Opportunity lookup), and transaction history. Reconciliation status stored as a custom field and ensures audit readiness.

Aderant Expert Sierra

Billing Rate / Fee Schedule

maps to

Microsoft Dynamics 365 Sales

Product / Price List Item

1:1
Fully supported

Expert Sierra per-attorney billing rates map to Dynamics 365 Product records or Price List Items. Each rate structure becomes a Product with a specific price. Linking rates to matters requires custom fields or integration with Dynamics 365's pricing engine for accurate billing.

Aderant Expert Sierra

Practice Group / Department

maps to

Microsoft Dynamics 365 Sales

Business Unit / Team

1:1
Fully supported

Expert Sierra practice group assignments map to Dynamics 365 Business Units or Teams. Attorneys assigned to practice groups receive team membership in Dynamics 365, enabling practice-group-level reporting through security roles and team ownership which also supports resource allocation and workload distribution across the firm.

Aderant Expert Sierra

Client Hierarchy / Office Structure

maps to

Microsoft Dynamics 365 Sales

Parent Account

1:1
Fully supported

Parent-client relationships in Expert Sierra map to Parent Account lookups in Dynamics 365. Office-level hierarchies become child Accounts under a parent firm Account, preserving organizational structure for multi-location law firms allowing consolidated reporting and simplified client management across all offices.

Aderant Expert Sierra

e-Billing Matters

maps to

Microsoft Dynamics 365 Sales

Custom Billing Setup Entity

1:1
Fully supported

Expert Sierra e-billing matter setup (client billing codes, matter billing codes, approval workflows) requires a custom Dataverse table (EBillingSetup__c). These configurations do not migrate automatically and must be rebuilt in Dynamics 365 or referenced for manual reconfiguration to ensure accurate billing gateway connectivity.

Gotchas + challenges

What specifically takes care here

Platform-specific issues from each side, plus the pair-specific challenges that don't show up on either platform's page on its own.

Aderant Expert Sierra logo

Aderant Expert Sierra gotchas

Medium

API rate limits are not publicly documented

High

Expert Sierra is cloud-only with no on-premises path

Medium

Custom field migration requires pre-migration field mapping

Medium

Implementation complexity drives long project timelines

Microsoft Dynamics 365 Sales  logo

Microsoft Dynamics 365 Sales gotchas

High

Professional tier 15-table custom table limit blocks migrations

High

October 2024 pricing increase applies at renewal for all customers

Medium

Custom fields must be created in the UI before API writes

Medium

Power Platform request limits apply to bulk migrations

Medium

Activity records orphaned to inactive owners fail silently

Pair-specific challenges

  • Legal-specific objects require custom Dataverse tables

    Aderant Expert Sierra stores billing rates, time entries, expenses, and trust accounts as first-class objects. Dynamics 365 Sales has no native equivalents — time entries, expenses, and trust accounting must become custom Dataverse tables (TimeEntry__c, Expense__c, TrustAccount__c). Sales Professional limits you to 15 custom tables total, which may push complex legal schemas toward Sales Enterprise licensing. We inventory all legal-specific objects during discovery and create a custom-table allocation plan before migration runs, so you know whether Enterprise licensing is required before data lands.

  • Matter-to-Opportunity mapping loses legal billing structure without custom fields

    Expert Sierra matters carry billing rate schedules, per-attorney rates, and matter-specific pricing rules that do not map to standard Dynamics 365 Opportunity fields. We preserve these as custom fields (BillingRate__c, MatterRateSchedule__c) on the Opportunity record, but Dynamics 365's pricing engine cannot natively apply Aderant's rate logic. Your billing team reviews the custom field mappings before final migration and rebuilds any automated rate calculations in Power Automate. These custom fields also store historical rate data so your team can reference original rates during reconciliation, and future rate adjustments can be implemented via Power Apps if needed.

  • Contact roles map to Opportunity Contact Roles but support only standard values

    Expert Sierra supports multiple contact roles per matter (Responsible Attorney, Billing Contact, Referring Attorney, Client). Dynamics 365 Opportunity Contact Roles support a fixed set of values (Decision Maker, Evaluator, etc.) with no ability to add custom role names. We map the most common roles and flag non-matching roles for your admin to either collapse into standard values or maintain in a custom entity. This is a data-loss decision your team makes before migration commits.

  • Trust account reconciliation logic does not transfer

    Expert Sierra trust accounting tracks client funds held in escrow with ledger-level detail and automatic reconciliation rules. Dynamics 365 Sales has no trust accounting module — even with a custom TrustAccount__c table, the reconciliation logic, posting rules, and client trust balance calculations must be rebuilt. We export the current trust balance and transaction history as reference data. Rebuilding the trust accounting workflow in Dynamics 365 or alongside Business Central is a separate implementation step outside migration scope.

  • e-Billing gateway configurations require manual re-setup

    Aderant Expert Sierra e-billing integrations with client billing systems (courts, corporate clients) use matter-level billing codes and approval routing configured within the practice management system. These gateway configurations are not exported via API and do not map to any Dynamics 365 entity. We preserve the billing code values as reference fields on the mapped Opportunity. Your team must manually re-enter e-billing gateway credentials and routing rules in Dynamics 365 or in a connected e-billing tool post-migration.

Migration approach

Six steps for a successful Aderant Expert Sierra to Microsoft Dynamics 365 Sales data migration

  1. Discover Aderant schema and design Dynamics 365 custom-table architecture

    We extract a full schema inventory from Aderant Expert Sierra — clients, matters, contacts, billing records, time entries, expenses, trust accounts, documents, and any custom fields. We cross-reference these against Dynamics 365's standard tables and identify which objects require custom Dataverse tables. If your setup exceeds Sales Professional's 15-table limit, we flag the licensing requirement and prioritize the most business-critical custom tables. We deliver a schema design document and field mapping specification for your Dynamics 365 admin to pre-create before data extraction begins.

  2. Extract data from Aderant and resolve attorney-to-user mappings

    We connect to Aderant Expert Sierra via API and database exports using administrator credentials. All structured records are extracted in a staging format. Simultaneously, we match Expert Sierra attorney IDs and responsible-party IDs to Dynamics 365 user accounts by email address. Unmatched attorneys are flagged for your team to either invite to Dynamics 365 or assign to a fallback owner. No record moves without a resolved owner; unresolved records are held in a quarantine list for manual assignment before migration commits.

  3. Transform and validate data against field mapping specification

    Extracted records are transformed to match the Dynamics 365 field schema — field names renamed, pick-list values mapped, date formats standardized, and lookup IDs resolved (Account must exist before Contact, Opportunity must exist before Invoice). We run a validation pass that checks required fields, field-length limits, and pick-list value coverage. Any records failing validation are corrected or quarantined with a correction report. A representative sample (typically 200–500 records spanning all object types) migrates first into a test Dynamics 365 environment for your team to verify data accuracy.

  4. Run full migration with delta-pickup window

    After sample validation sign-off, the full migration runs against your production Dynamics 365 environment. A delta-pickup window (typically 24–48 hours) opens simultaneously, capturing any new matters, billing records, or contact updates created in Expert Sierra during the cutover. We maintain a complete audit log of every record migrated — operation type, source record ID, destination record ID, and timestamp. If reconciliation reveals missing or misaligned records, one-click rollback reverts the migration batch so your team can correct and re-run without data corruption.

  5. Post-migration verification and rebuild reference export

    We generate a reconciliation report comparing record counts and field values between Aderant source and Dynamics 365 destination. Trust account balances, billing totals, and matter revenue figures are spot-checked against your Expert Sierra reports. We export all workflow definitions, automation rules, and e-billing configurations from Aderant as reference documents for your Dynamics 365 admin to rebuild in Power Automate or Dataverse workflows. Custom table formulas or calculated fields that cannot transfer are documented with the input fields required so your team can reconstruct them in Dynamics 365.

Platform deep dives

Context on both ends of the pair

Aderant Expert Sierra logo

Aderant Expert Sierra

Source

Strengths

  • AWS-hosted with SOC 2 Type 2 compliance and zero reported data breaches in over seven years of cloud management.
  • Lift-and-shift migration path preserves the existing Expert database structure and all customizations without data conversion.
  • Purpose-built trust accounting engine handles client funds with jurisdiction-specific compliance rules natively.
  • Comprehensive financial module covering billing, trust accounts, cost-centre profitability, and revenue cycle management in a single platform.
  • Active migration support from Aderant Professional Services with documented tooling and a refined deployment methodology.

Weaknesses

  • Per-user pricing is enterprise-grade and not publicly published, making cost modelling for large firms difficult without a formal sales engagement.
  • Implementation complexity and project duration (firms report nine months or more for complex migrations) create a significant barrier to adoption.
  • The user interface is described by reviewers as dated and non-intuitive, leading to steep learning curves for administrative staff and lower overall adoption rates.
  • Modern mobility and client-facing collaboration features lag behind newer cloud-native legal platforms, limiting appeal for firms prioritising client experience.
Microsoft Dynamics 365 Sales  logo

Microsoft Dynamics 365 Sales

Destination

Strengths

  • Native integration with Microsoft 365, Teams, Outlook, and SharePoint for unified productivity workflow
  • Unlimited custom tables and complex workflows on Enterprise tier enable deep customization for complex sales processes
  • AI-driven predictive analytics and deal intelligence on Enterprise and Premium tiers help sales teams prioritize pipeline
  • Dataverse unified data layer provides a consistent API and data model across all Dynamics 365 and Power Platform apps
  • Strong security model with Field-Level Security and Record Ownership rules for governance-conscious enterprises

Weaknesses

  • Sales Professional tier caps custom tables at 15, creating a migration ceiling for highly customized SMB environments
  • October 2024 pricing increases of $15 per user across all tiers apply to existing customers upon renewal
  • Implementation typically requires costly certified partners, adding 30–50% to total project cost
  • Updates and platform releases can disrupt customizations and plugins, requiring regression testing after each wave
  • Non-Microsoft integrations require additional configuration or middleware, limiting flexibility for heterogeneous tech stacks

Complexity grading

How hard is this migration?

Standard CRM migration. 2 of 8 objects need a mapping; the rest are 1:1.

B

Overall complexity

Standard migration

Derived from compatibility, mapping clarity, API constraints, and data volume across Aderant Expert Sierra and Microsoft Dynamics 365 Sales .

  • Object compatibility

    B

    2 of 8 objects need a mapping; the rest are 1:1.

  • Field mapping clarity

    C

    Field mapping is derived from defaults — final spec confirmed during the sample migration.

  • Timeline complexity

    B

    8-object category — typical timelines run 2–7 days end-to-end.

  • API constraints

    B

    Aderant Expert Sierra: Not publicly documented — Aderant enforces limits per API at its discretion and requires separate consent to exceed them.

  • Data volume sensitivity

    B

    Aderant Expert Sierra doesn't expose a bulk API — REST + parallelization used for high-volume runs.

Estimator

Estimate your Aderant Expert Sierra to Microsoft Dynamics 365 Sales migration cost

Rule-based pricing — no per-record fees, no manual quotes. Migrations over 2M records are scoped individually.

Step 1

What are you migrating?

Pick a category, then your source and destination platforms.

Category

FAQ

Frequently asked questions about Aderant Expert Sierra to Microsoft Dynamics 365 Sales data migrations

Answers to the questions buyers ask most during Aderant Expert Sierra to Microsoft Dynamics 365 Sales migration scoping. Not seeing yours? Book a call.

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Most Aderant-to-Dynamics 365 migrations complete in 3–5 days for under 50,000 records. Firms with 500,000+ records, extensive matter hierarchies, or multiple custom Dataverse tables extend to 2–4 weeks. The longest planning step is custom-table design — identifying which legal-specific objects require Dataverse tables and confirming whether Sales Professional's 15-table limit applies or Enterprise licensing is needed. Additional time is reserved for attorney-to-user mapping and a final delta-pickup window to capture any records created during cutover.

Adjacent paths

Related migrations to explore

Ready when you are

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Land in Microsoft Dynamics 365 Sales , intact.

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