Trying to migrate to Microsoft 365: You can't sign in here with a personal account. Use your work or school account instead.

Question

Trying to migrate to Microsoft 365: You can't sign in here with a personal account. Use your work or school account instead.

Karl-8245 20

I have a small business with ~20 users in Google workspace. We are trying to migrate to Microsoft 365. I added the Google App "Microsoft 365 Migration", and when I click that, the resulting login page gives me the error "You can't sign in here with a personal account. Use your work or school account instead."

I'm trying to CREATE a work account. My current business email, which is a squarespace hosted thing on a custom domain ([Moderator note: Personally Identifiable Information removed]@ourbusinessname.com) is a personal account on Microsoft. Do I need to create an entirely new business email? In that case I'd have to do that for everybody?

We all already have microsoft accounts just so we could "activate" our laptops, so I think the goal I'm after is converting all of our personal accounts --> work accounts.

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Answer accepted by question author

Helen Luu 2,700 Independent Advisor

Hello @Karl-8245

Microsoft personal accounts and Microsoft work/business accounts are separate account types and are managed independently. Currently, there is no supported method to convert personal Microsoft accounts into work or business accounts.

To start Microsoft 365 for business, you will need to create a new Microsoft 365 tenant and start a business subscription or trial. You can review the available plans here: Microsoft 365 Business Plans and Pricing

During the setup process, you will first be required to create an initial domain with tenantname.onmicrosoft.com format. Once the tenant has been created, you can add and configure your custom domain (for example, @ourbusinessname.com) by following the instructions in this article: Add a Custom Domain to Microsoft 365

After your custom domain has been verified and configured, you can create new user accounts and assign the appropriate Microsoft 365 licenses to them: Add users and assign licenses in Microsoft 365 - Microsoft 365 admin | Microsoft Learn

Please note that existing personal Microsoft accounts cannot be directly migrated into a Microsoft 365 business tenant. New work accounts will need to be created within the tenant, and any required data would need to be moved separately.

I hope this information is helpful. Please let me know if you have any questions or need further assistance.

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1 additional answer

Your answer

Answer 1

The AI answer was as follows:

No. Personal Microsoft accounts and Microsoft 365 work or school accounts cannot be merged or converted. They can only be used side by side.

For a Microsoft 365 business migration, the required sign-in is a work or school account, not a personal Microsoft account. That is why the migration app is rejecting the existing personal account tied to the same custom-domain email address.

What to do:

Create the Microsoft 365 business tenant and use the work account that is created for it.
- For business subscriptions, the sign-in account is typically a work account such as an onmicrosoft.com admin account.
  - Check the mailbox used during signup for the Microsoft 365 business subscription details.
  1. Add the existing business domain to Microsoft 365.
    - In the Microsoft 365 admin center: Show all > Settings > Domains > Add domain.
      - Verify ownership by adding the TXT record at the DNS host.
        
        Since the domain is hosted through Squarespace, add the TXT record there, then return and select Verify.
        
        Assign that domain to users in Microsoft 365.
        
        In the admin center: Users > Active users.
        
        For each user, select Manage username and email > Edit, choose the business domain, then save.
        
        Keep using the same business email addresses for Microsoft 365 mailboxes after the domain is added and assigned.
        
        An entirely new business email domain is not required.
        
        The migration guidance explicitly supports adding the existing Google Workspace domain to Microsoft 365 so the same business email address can continue to be used.
        
        Migrate mailbox data after the Microsoft 365 work accounts exist.
        
        The Microsoft 365 admin center supports Google Workspace mailbox migration by IMAP.
        
        Before Microsoft 365 can connect to Gmail or Google Workspace, each account owner must create an app password and 2-step verification must be enabled.
        
        IMAP migration moves email only, not calendar or contacts.

About the existing personal Microsoft accounts:

Those personal accounts do not become work accounts.
If the same email address exists as both a personal Microsoft account and a work account, Microsoft can show a "Which account do you want to use?" prompt.
To reduce that confusion, one supported option is to rename the personal Microsoft account by changing its primary alias.

So the practical path is:

create the Microsoft 365 business tenant,
sign in with the new work/admin account,
add and verify the current domain,
create or assign work accounts for each of the ~20 users on that same domain,
then run the migration.

This is a little too condensed and jargoned for me to understand. I need step 1 broken down and drawn out with crayons. It's what I've been trying to do for the last 24 hours but I can't create it because the error message pops up every time. Not to mention the continuous sign-in loop over and over and over.