2026 Microsoft Dynamics 365 Migration Guide
CRM data migration is one of the most important and difficult parts of running a business. It's also a large source of data loss and frustration for customers in all industries. During my decade plus of experience performing migrations like these, a few platforms stood above the rest when it came to ease of migration. Dynamics 365 is one of the easiest platforms to migrate data to, not only because of its intuitive mapping interface, but also because of its seamless integration with Power Automate.
If you're looking to ditch your old CRM in favor of migrating to D365, here's my playbook for ensuring a successful migration no matter what platform you're migrating from.
Clean Your Data
Cleansing your current data is an absolute must before moving it into its new home. I've written extensively about it on this site and created a free data cleaning tool for this purpose.
Prune Old Records
Not all data needs to come to the new house. Similar to getting rid of clothes that don't fit or tech you never use, you should dump useless data.
Begin Mapping Before Import
Map your data
Before importing anything, you'll need to map your data to the Dynamics import format.
Here's how to find the template.
Note: Any new fields you create will always have the new_ prefix in front of them. For example, new_email_address.
Settings (Gear Icon) > Advanced Settings > Data Management > Templates for Data Import
Choose the type of data you want to import (cases, leads, etc.) and select download. This will be your guide when prepping data for migration.
Pro Tip: Use Python to Speed Up Data Mapping
To avoid manually mapping the data yourself, use an AI agent. Simply build the mapping, i.e., email_address_c to new_email_address, and let CoPilot handle the rest. Now, if you have a huge dataset or sensitive data, you may want to run the mapping on your laptop or PC directly.
For that, you can use a Python script. If interested, I can provide a script for you to use along with instructions. Just drop me a DM on the socials listed at the bottom of this article.
Super Pro Tip: Use CoPilot to Speed Up Data Mapping
Instead of mapping manually or running a Python script locally, use Power Automate to handle the mapping for you. Here's how you can do it.
- Load your cleaned data into a SharePoint folder.
- Set Power Automate to trigger a flow once a file is loaded.
- Provide your mappings (old_email_c to new_email_address).
- Create a new spreadsheet with the mapped fields for review.
- Approve the import by changing a designated field to Ok To Import.
- Power Automate loops through rows and imports the records.
Use Power Automate to Detect and Adjust Anomalies
Dynamics 365 has very good data hygiene features built into the platform. But these features must be tailored to your unique business needs. To keep your dataset tidy and accurate, you can employ Power Automate to scan a subset (or all) of your data periodically and detect defective records.
Then, your agent can either alert you to the problematic records or correct them for you.
If you're interested in deeper automation strategies, take a look at this guide on How to Use Dynamics 365 and Power Automate to Eliminate Manual Work.
Here's a sample flow for both.
Error Detection + Alert
- A scheduled Power Automate flow runs once a week at the end of the business day.
- It gathers a list of records that meet your error definition (for example, enrolled in an email campaign without the opt-in box being checked).
- The records are deposited into a spreadsheet for review.
- Records in D365 are set to Marked for Review.
- Record owners receive an email instructing them to correct the flagged records.
Error Detection + Adjustment
- The flow begins the same way as the alert workflow.
- Power Automate makes adjustments. For example, records enrolled in a campaign without the opt-in field checked are removed.
- Corrections are logged in a spreadsheet for review.
- Record owners receive an email summarizing the changes.
Bonus: Build in a Rollback Feature
Dynamics 365 does not natively let you roll back bulk changes once they've been made. If your automation updates a large number of records and something goes wrong, you'll need Power Automate to handle the recovery.
One simple way to do this is to store the original values in a spreadsheet before the changes are made. If your Error Detection + Adjustment flow introduces problems, you can use that spreadsheet to restore the records back to their original state.
Modern Successful Migrations Use Agentic AI Where Possible
Relying solely on giant CSV files and manual data mapping is a surefire way to ensure data is corrupted, missed, or both. If you're going all-in on the Microsoft ecosystem and using Dynamics 365, there's no reason you shouldn't use tools like Power Automate and CoPilot to help ensure a smooth transition. But if you're ever stuck, or have questions about moving data from your old CRM to the new, give us a call or drop me a DM on the socials listed below.
P.S. If you want to see another real-world automation example, take a look at how I used Power Automate to reduce operational costs in healthcare workflows: Save Costs on Prior Authorization Faxing Using Power Automate.
If you're planning a migration and want a structured approach, you may also find this guide helpful: CRM Data Migration Project Plan.
Frequently Asked Questions
Can Dynamics 365 imports be undone?
No, unlike other platforms, you cannot undo an import into D365. If you need to remove the records, you'll need to perform a bulk delete.
What is the biggest mistake companies make when migrating to a new CRM?
Failing to clean their data is the single biggest mistake companies make when migrating to a new CRM. Misleading data leads to errors in operational processes, missed deadlines, stale leads, and a whole slew of other issues. Clean, prune, validate, then move.
Is Dynamics 365 Low Code or No Code?
D365 is mostly a low code platform. Many people use it for years without cracking open the console to write any code. However, if you have many complex integrations and API connections, there can be a fair bit of coding involved, though nothing compared to what it was years ago.
How long should I keep the subscription to my old CRM active?
I recommend keeping your old CRM active for at least three months after the move. If that is out of the budget, you should at least have a reliable backup available for reference. Sometimes you only notice something is missing when you need it, so being able to look up a record that may have been left behind during the move is important.
Posted by: Matt Irving on 03/16/2026