To use a custom domain you need more steps and knowledge. I recommend getting a consultant near you. He or she will setup your environment in about 1 to 3 hours. Depends if all the functionality you need. Answer from der_klee on reddit.com
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Microsoft Learn
learn.microsoft.com › en-us › microsoft-365 › admin › simplified-signup › signup-business-standard
Sign up for Microsoft 365 Business Standard - Microsoft 365 admin | Microsoft Learn
You can create a new business email account by adding a domain or sign in with your current personal email. When signing up for Microsoft 365 Business Standard, you have 2 options for how to get started.
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Fit Small Business
fitsmallbusiness.com › microsoft-365-business-email-setup
How to Create a Business Email With Outlook in 5 Easy Steps
February 19, 2025 - After choosing your plan, finalize your subscription and enter the Outlook email account you want to upgrade into a business Outlook email plan. Follow the prompts to fill in your name and company details. You’ll also need to verify your phone number. Finalize your Microsoft subscription. (Source: Microsoft) Enter your business details. (Source: Microsoft) Then, verify your phone number. (Source: Microsoft) After signing up for your account, the next step is to create your new business email address.
People also ask

Is Outlook email free for business?

Microsoft Outlook offers a free plan, but it doesn’t come with a custom domain (only an @outlook.com one), which may not be suitable for business use. It also only accommodates one user. Microsoft 365’s business plans start at $6 a month and let you use a custom email domain (e.g., [email protected]) and add multiple users to your organization. It also comes with the Microsoft Office productivity suite, including Word, Excel, and PowerPoint.

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fitsmallbusiness.com
fitsmallbusiness.com › microsoft-365-business-email-setup
How to Create a Business Email With Outlook in 5 Easy Steps
Should I use Outlook or Gmail for business email?

Use Outlook for your business email if you need a lot of email and cloud storage. Microsoft provides up to 50GB of mail storage and 1TB of cloud storage on all its Business plans. It’s also a good option for more productivity tools like a collaborative workspace or online video editor. Choose Gmail if you want an easier setup process and beginner-friendly interface or are more familiar with the Google Workspace productivity suite.

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fitsmallbusiness.com
fitsmallbusiness.com › microsoft-365-business-email-setup
How to Create a Business Email With Outlook in 5 Easy Steps
How do I create a professional email in Outlook?

To create a professional email in Outlook, you’ll first need to subscribe to a Microsoft 365 Business plan, which lets you add a custom domain to your email account to get a branded email address and not a generic “@outlook.com” one. After subscribing to a Microsoft 365 plan, create your new email address and finish setting up your account by adding a custom domain, inviting your team members, and installing the Microsoft 365 platform on your computer.

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fitsmallbusiness.com
fitsmallbusiness.com › microsoft-365-business-email-setup
How to Create a Business Email With Outlook in 5 Easy Steps
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SoftwareKeep
softwarekeep.com › blogs › how-to › set-up-office-365-email-for-business
Step by Step Guide to Set Up Microsoft 365 Business eMail
December 16, 2024 - ... To begin, go to the Microsoft 365 website. Examine the available plans (under the "For business" page) to choose the one that includes the applications your firm needs, then click the "Buy now" button.
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Microsoft Learn
learn.microsoft.com › en-us › microsoft-365 › admin › setup › signup--apps-business
Sign up for Microsoft 365 Apps for business - Microsoft 365 admin | Microsoft Learn
On the For business page, see what's included. Under Microsoft 365 Apps for business, select Buy now. On the You've selected Microsoft 365 Apps for business page, enter an email address that you already use.
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Microsoft Learn
learn.microsoft.com › en-us › microsoft-365 › admin › setup › signup-business-basic
Sign up for Microsoft 365 Business Basic - Microsoft 365 admin | Microsoft Learn
Enter an email address that you already use. This can be any address you want Microsoft to use to communicate with you during setup. It's also the address where we'll send you information about your bill and renewals.
Find elsewhere
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Microsoft Support
support.microsoft.com › en-us › office › welcome-to-microsoft-365-for-business-d60a9cbe-8cb5-4807-b57c-bca553e372aa
Welcome to Microsoft 365 for business - Microsoft Support
Go to microsoft365.com and sign in with your business username and password. When you sign up for a subscription, you specify an alternate email address where you'll get emails from Microsoft that include links to sign into your Microsoft 365 business account.
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Microsoft Learn
learn.microsoft.com › en-us › microsoft-365 › admin › setup › setup
Set up Microsoft 365 for business - Microsoft 365 admin | Microsoft Learn
Not a business? See Set up for Microsoft 365 Family or Microsoft 365 Personal. ... Get started (link page) How to sign up - Admin Help (video) Try or buy a Microsoft 365 for business subscription (article)
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Microsoft
office.com
Login | Microsoft 365 Copilot
Sign in Get Microsoft 365 Sign up for the free version of Microsoft 365
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Orlando IT Services
gocloudaccess.com › how-to-set-up-microsoft-365-business-email
How to Securely Set Up Microsoft 365 Business Email - Orlando IT
March 6, 2025 - You might think that setting up a Microsoft 365 Business Email could be a complicated or time-consuming task, but it’s actually a smooth process once you get the hang of it. By strategically purchasing the right subscription, verifying your domain, and configuring your email settings, you’ll have your professional email up and running in no time.
Address   695 Venture Circle, 32807, Orlando
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White Peak Digital
whitepeakdigital.com › blog › how-to-setup-a-custom-email-with-microsoft-365
How to Setup a Custom Email with Microsoft 365
May 11, 2025 - To begin, visit the Microsoft 365 website and choose between Buy now or Try free for one month. The steps will vary slightly based on your choice, but the overall process is similar.
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Neo
neo.space › blog › microsoft-business-email-office-365-email-pricing-plans
Microsoft Business Email Pricing | Office 365 Email Plans - 2024
Answer: To create a Microsoft Business Email account, purchase a Microsoft 365 for Business subscription. After subscribing, log in to the Microsoft 365 admin center, go to 'Setup,' and follow the prompts to set up your domain and create email accounts for your team.
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Microsoft Learn
learn.microsoft.com › en-us › answers › questions › 5616333 › add-business-email-to-microsoft-acct
add business email to microsoft acct - Microsoft Q&A
Go to File → Add Account. Enter your business email address and click Connect. Enter your Microsoft 365 credentials (email + password). If prompted, approve the sign-in using Multi-Factor Authentication (MFA).
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Microsoft Learn
learn.microsoft.com › en-us › answers › questions › 5310984 › how-do-i-access-my-new-business-account
How do i access my new business account ? - Microsoft Q&A
Go to microsoft365.com and sign in with your business username and password. (If you are still redirected to your personal account, you can open your browser in private mode) When you sign up for a subscription, you specify an alternate email ...
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Mailmeteor
mailmeteor.com › blog › outlook-business-email
How to Set Up Your Outlook Business Email (Guide w/ Pictures - 2024)
August 21, 2024 - Go to Outlook.com and log into your primary account. In the top right corner, click on your profile icon to open the dropdown menu. Click the “Sign in with a different account” option from the dropdown menu.
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Microsoft Learn
learn.microsoft.com › en-us › microsoft-365 › admin › simplified-signup › signup-teams-business-subscription
Sign up for a Microsoft Teams business subscription - Microsoft 365 admin | Microsoft Learn
See the table below for sign-up options and the services that will apply to your selection. A business email is an email that uses your own domain name. For example, if you own the domain name contoso.com, you can build a website using the url www.contoso.com, but you can also have a custom email address such as [email protected].
Top answer
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@BAMA IT ,
It sounds like you are trying to create Microsoft accounts using your company's email addresses, but the system is rejecting them. There are a few potential reasons why this might be happening:

  • Microsoft may not allow you to use a business email address to create a personal Microsoft account. In this case, you need to use a different email address (such as a personal email address) to create the Microsoft account.
  • Your company may have policies that prevent you from using business email addresses to create personal accounts. In this case, you would need to check with your company's IT department or email administrator to see if there is a way to create Microsoft accounts using your company's email addresses.
  • There could be a technical issue preventing you from creating the Microsoft accounts. In this case, you may want to try again later or contact Microsoft support for assistance.

If you want to use your company's email addresses to log into Microsoft services, the best way to do this would be to use Azure Active Directory (AAD) to manage the accounts. With AAD, you can create and manage user accounts for your company and use these accounts to log into Microsoft services such as Office 365, Microsoft Teams, and others. This will allow you to use your company's email addresses to log into these services while still maintaining control over the accounts and ensuring that they are only used for business purposes.

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Please "Accept as Answer" and Upvote if any of the above helped so that it can help others in the community looking for remediation for similar issues.

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You can create an alias, then you'll be able to use that alias for sign in anywhere you can sign in with your microsoft account.
https://support.microsoft.com/en-us/office/add-or-remove-an-email-alias-in-outlook-com-459b1989-356d-40fa-a689-8f285b13f1f2

--please don't forget to upvote and Accept as answer if the reply is helpful--

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Microsoft
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Email Signup
Stay informed about special deals, the latest products, events, and more from Microsoft Store. Available to Canada residents · By clicking Sign up, I would like to hear from Microsoft and its family of companies via email about Microsoft Store information and other Microsoft products and services