Microsoft replacement

From Microsoft to Odoo

Replace Dynamics NAV, Business Central, GP, SL and AX with Odoo, and Office and SharePoint with OnlyOffice

We move the whole Microsoft stack: ERP and Office together. Everything ends up in one private cloud that we operate.

Figure as text: Microsoft stack (ERP and Office) → Move all of it → Private cloud (operated by us, partner brand Re:Cloud)

  • Dynamics ERP (NAV, Business Central, GP, SL, AX) → Odoo (ERP)
  • Office + SharePoint (and OneDrive) → OnlyOffice + Nextcloud (documents and files)
  • Outlook + Exchange (mail) → Mail (mailboxes and folders)
  • Teams (chat and video) → Chat (and video calls)

Microsoft: end of extended support

Chart as text

  • Extended support according to Microsoft Lifecycle: Dynamics AX 2012 R3: 10 Jan 2023; Access 2016 and 2019: 14 Oct 2025; Business Central on-premises up to version 14: 14 Oct 2025; Dynamics CRM 2016: 13 Jan 2026; Dynamics NAV 2017: 11 Jan 2027; Dynamics NAV 2018: 11 Jan 2028; Dynamics SL 2018: 11 Jul 2028; Dynamics GP: support and tax updates: 31 Dec 2029; Dynamics GP: security updates: 30 Apr 2031. Dates in Pacific Time. Dynamics GP follows the Modern Lifecycle Policy (end 31 Dec 2029, security updates if needed until 30 Apr 2031). Microsoft supports newer Business Central on-premises versions only if the installation is kept current.
Sources: Microsoft Lifecycle: Dynamics AX 2012 R3 · Microsoft Lifecycle: Access 2019 · Microsoft Lifecycle: Dynamics 365 Business Central on-premises (Fixed Policy) · Microsoft Lifecycle: Dynamics CRM 2016 (Dynamics 365) · Microsoft Lifecycle: Dynamics NAV 2017 · Microsoft Lifecycle: Dynamics NAV 2018 · Microsoft Lifecycle: Dynamics SL 2018 · Understand the Lifecycle Policies - Dynamics GP (accessed 10 Nov 2026)

At a glance

  1. According to Microsoft, extended support ends for NAV 2018 on 11 Jan 2028 and for SL 2018 on 11 Jul 2028; for GP, support and tax updates end on 31 Dec 2029.

  2. First record current processes and customisations, then check what standard Odoo already covers.

  3. Legacy data goes through a staging table whose rows a person checks.

  4. After the self-check on this page you receive a five-year comparison by mail: stay or move.

From Dynamics, Access or Excel to OdooDynamics, Access, ExcelInventoryprocesses, customisations, interfacesStaging tablea person checks the rowsAccountingSKR03/SKR04, reconciliationOdoolive per area
From Dynamics, Access or Excel to Odoo Record current processes and customisations first, then import data via a checked staging table, reconcile accounting and go live per area.

Diagram as text

  1. Dynamics, Access, Excel
  2. Inventory (processes, customisations, interfaces)
  3. Staging table (a person checks the rows)
  4. Accounting (SKR03/SKR04, reconciliation)
  5. Odoo (live per area)

Simplify-ERP moves companies from Microsoft Dynamics NAV, Business Central, GP, SL, AX or CRM to Odoo, and from Office and SharePoint to OnlyOffice with Nextcloud in a private cloud. Current processes and customisations are recorded first, legacy data is imported via a staging table that a person checks, the chart of accounts is mapped to SKR03 or SKR04 and reconciled, and areas go live one after another. According to Microsoft, extended support ends for NAV 2018 on 11 January 2028 and for SL 2018 on 11 July 2028; for GP, support and tax updates end on 31 December 2029. After the self-check on the page, a five-year comparison of staying and moving follows by mail.

How the move works

Where you start, per system

The dates come from Microsoft Lifecycle (Pacific Time, accessed 8 Nov 2026 and 10 Nov 2026).

  • Dynamics NAV (Navision)

    Extended support according to Microsoft: NAV 2016 until 14 Apr 2026, NAV 2017 until 11 Jan 2027, NAV 2018 until 11 Jan 2028. The question is: carry the customisations over to Business Central or switch systems. First check which customisations you really use today.

  • Dynamics 365 Business Central

    According to Microsoft, 55,000 companies use Business Central. No end of support is pressing here; the questions are annual licence cost, freedom to customise, dependency on the partner and how well the processes fit. On-premises up to version 14, extended support ended on 14 Oct 2025; newer versions only if the installation is kept current.

  • Dynamics GP (Great Plains)

    According to Microsoft, enhancements, tax updates and technical support end on 31 Dec 2029; security updates, if needed, until 30 Apr 2031. Microsoft recommends moving to Business Central; the choice of target system is yours.

  • Dynamics SL (Solomon)

    According to Microsoft, extended support for SL 2018 ends on 11 Jul 2028. Project accounting and billing are usually the core: check how projects, time and invoices connect today.

  • Dynamics AX (Axapta)

    Extended support for AX 2012 R3 ended on 10 Jan 2023. AX installations are often large and heavily customised; whether Odoo fits depends on scope and processes and is checked per area.

  • Dynamics CRM, Excel and Access

    Extended support ended for CRM 2016 on 13 Jan 2026 and for Access 2016 and 2019 on 14 Oct 2025. Contacts, opportunities and processes from home-grown solutions move along.

How the move runs

  • 1. Inventory

    Current processes, customisations and interfaces are recorded, documented and translated into a specification.

  • 2. Check against the standard

    For each requirement it is checked whether the Odoo version and edition already cover it, before any code is written.

  • 3. Data transfer with checks

    Customers, products, projects and stock are checked, cleaned and imported via a staging table whose rows a person checks; a dry run writes nothing.

  • 4. Accounting

    The chart of accounts is mapped to SKR03 or SKR04, the opening balances are taken over and reconciled.

  • 5. Go-live per area

    Sales, purchasing and accounting go live area by area; key users are trained beforehand.

Knowledge: recording current processes

Office and SharePoint: OnlyOffice with Nextcloud

Whoever changes the ERP often asks about office and file storage too. Both can run in your own private cloud, through our partner brand Re:Cloud.

  • Editing documents

    OnlyOffice is an open-source office suite with documents, spreadsheets, presentations and PDF editing; ONLYOFFICE Docs and DocSpace run with Nextcloud on Kubernetes.

  • Files and permissions from SharePoint

    SharePoint and OneDrive are moved into your own private cloud with files, folders and permissions; parallel operation during the move is possible.

  • Connection to Odoo

    Documents are managed in Odoo Documents and the Nextcloud DMS, which keeps the Odoo database small.

  • Count templates and macros first

    Before the move, check which templates, macros and links carry your processes. They drive the effort more than the number of files.

Re:Cloud: private cloud

In brief: Power BI

Power BI does not have to go when the ERP changes. Afterwards the reports read Odoo data instead of Dynamics tables; we set up the connection: read-only user or replica, data gateway, row-level security and refresh.

  • Switch the data source

    Power BI reads Odoo data through read-only access to the PostgreSQL database, through the Odoo API or from a separate data store such as the Odoo DataLake.

  • Map the measures again

    Odoo has a different data model from Dynamics. Check for each report which tables and fields its measures will come from.

Connecting Power BI to Odoo

In brief: Outlook and Teams

Mail, chat and video conferencing can also run in your own hands.

  • Mail

    Mailboxes, folders and attachments can be mirrored into the private cloud without changing the mail system.

  • Chat and video conferencing

    The private cloud includes chat; video conferencing runs on Jitsi Meet on Kubernetes.

Decision rules

  • Plan backwards from the end of support

    Inventory, data transfer, tests and training all come before go-live. Counting back from the date shows when the project has to start.

  • Count five years, not one

    Compare licences, partner cost and the upcoming project over five years. An upgrade on the Microsoft side is a project too.

  • Do not simply rebuild customisations

    Every customisation shapes later version upgrades. Check for each one whether the standard plus a process change is enough.

  • Clean first, then import

    Cleaning data before the import saves more than correcting it afterwards.

  • Write formulas down as rules

    What lives in Excel or Access formulas is written down as a rule before it moves into the ERP.

  • Keep retention in mind

    Books and records of the old system must be kept for ten years (§ 147 AO). Settle early how you will access them afterwards.

  • One leading system per interface

    For each interface it is defined which system leads and where the data flows.

Knowledge: moving accounting to Odoo

Key facts

Source systems
Dynamics NAV, Business Central, GP, SL, AX, CRM; Excel, Access
Office and files
OnlyOffice with Nextcloud in a private cloud
Data transfer
Staging table with a human row check
Chart of accounts
SKR03 or SKR04
Go-live
Area by area

Self-check with cost comparison

Answer the questions and enter your Microsoft costs in stage 2. We send you the five-year comparison by mail after you confirm.

  • Staying: your licence, partner and project costs; without a licence amount, Microsoft list prices (source with access date)
  • Moving: Odoo licence, running, support and the one-off project effort as guide values, the result as a range
  • Not included: internal staff time, hardware, parallel run. Net, not a quote
Self-check

How ready is your company to switch to Odoo?

12 to 13 questions on system, scope, data and team. You get an assessment with risks and order straight away, plus an indicative quote if you want one.

  • No sign-up, your answers stay in your browser
  • Go back and forth at any time, continue later
  • Result right away, indicative quote by mail
about 4 minutes · no sign-up

FAQ

Frequently asked questions

When does support end for our Dynamics version?

According to Microsoft, extended support ends for NAV 2017 on 11 January 2027, for NAV 2018 on 11 January 2028 and for SL 2018 on 11 July 2028. For GP, enhancements, tax updates and technical support end on 31 December 2029, security updates if needed on 30 April 2031. It has already ended for AX 2012 R3 (10 January 2023), Business Central on-premises up to version 14 (14 October 2025), CRM 2016 (13 January 2026) and NAV 2016 (14 April 2026). Newer Business Central on-premises versions are supported only if the installation is kept current.

We already run Business Central. Why would we look at Odoo?

For Business Central no end of support is pressing. The questions are different: what licences and the partner cost per year, how freely you can customise, how dependent you are on one partner and how well the processes fit. The self-check on this page puts your figures side by side over five years and sends you the comparison by mail.

Can data from NAV, Business Central, GP or AX be taken over?

Customers, products, projects and stock from legacy systems are checked, cleaned and imported. The columns of an export are mapped onto a staging table, a person checks the rows, and only then is anything written into Odoo; a dry run writes nothing. The opening balances are taken over and reconciled.

Can we leave SharePoint and Microsoft Office too?

Yes. OnlyOffice with Nextcloud runs in a private cloud of our partner brand Re:Cloud; SharePoint and OneDrive are moved with files, folders and permissions. Documents are managed in Odoo Documents and the Nextcloud DMS.

Can we keep Power BI?

Yes. Power BI reads Odoo data through read-only access to the PostgreSQL database, through the Odoo API or from a separate data store such as the Odoo DataLake; we set up the connection, the data gateway, row-level security and refresh. Because Odoo has a different data model from Dynamics, check for each report which tables and fields its measures will come from.

How is the price comparison calculated, and how do you get advice for your company's needs?

In the self-check on this page you enter users, licence and partner cost, a pending Microsoft quote, customisations, years of history and office seats. After you click the confirmation link in our mail, you receive the comparison of staying and moving over five years by e-mail, either in the result mail or personally from Ashant Chalasani. It is not a quote, and the page itself shows no prices. For advice on your own company, book a conversation with the button at the end of this page, or simply reply to the result mail.

What happens to the old accounting records?

Books and records must be kept for ten years under § 147 AO, also after the move. Settle early how you will access the old system's records.

Questions about your project?

Talk your starting point through with us.

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