Issue "You can't sign in here with a personal account. Use your work or school account instead"

Question

Issue "You can't sign in here with a personal account. Use your work or school account instead"

BartD 0

I am unable to send or receive messages via Outlook on my personal computer and when I try to verify my credentials on-line, I receive a message that "You can't sign in here with a personal account. Use your work or school account instead." I tried logging in via outlook.live and but even when I log in, my profile email there is a bunch of letters "@outlook.com" (not my actual email address even though my name of the account is correctly displayed). Please help!

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Answer 1

EmilyS726 222.2K Independent Advisor

Are you using third party email address as your Microsoft account alias/username? Such as gmail.com, or others?

BartD 0 Reputation points

2026-03-14T17:33:27.83+00:00

Yes I am.
EmilyS726 222.2K Reputation points Independent Advisor

2026-03-14T17:37:04.19+00:00

Ok, that's the problem. The outlook.com web interface is not an email app. It is the web-based email box for native outlook.com/hotmail.com addresses only.

When your Microsoft account uses a non-Microsoft email address, the Microsoft account itself does not have its own email functionality. The actual sending and receiving of emails still happens through your third party email provider. So, when you go to the outlook.com web interface, you would see this random outlook.com address.

To give your Microsoft account proper email functionality, you can create a Microsoft-based email alias and set it as the primary alias. Here is how:

Go to https://account.live.com and sign in to your personal account.

Click on "Your Info," then choose "Sign-in preferences," and select "Add an alias."

Choose to create a new alias. It will allow you to create one that's outlook.com.

After creating it, set it as your primary alias.

Keep your current third party email as a secondary alias if you wish.
BartD 0 Reputation points

2026-03-14T17:37:32.4333333+00:00

I am using gmail.com (which is my Microsoft 365 user account). It works on the other Microsoft apps like Word and PowerPoint. I've had no problem with it until today. I've updated Microsoft Office (as suggested by the AI answer) but this did not fix the issue and I cannot send or receive my mail from the Outlook app (or access it online)
EmilyS726 222.2K Reputation points Independent Advisor

2026-03-14T17:41:05.49+00:00

When you used your gmail address to sign into Word or Powerpoint, your gmail only serves as a username.

When you used your gmail in your Outlook app, Outlook is an email client app, it allows the app to actually go connect with Google, so it can send email and receive email on behalf of Google. Did you hit an error like 0x800ccc0e or 0x800ccc0f? If so, this is a known issue. Many users seem to have this issue recently. Microsoft is still investigating this issue. The current workaround is published here: https://support.microsoft.com/office/users-get-errors-0x800ccc0e-0x800ccc0f-synchronizing-gmail-and-yahoo-accounts-in-classic-outlook-e5a7b684-7c5c-4848-ab2d-d48291451f67
BartD 0 Reputation points

2026-03-14T17:46:07.7266667+00:00

Thank you Emily. I have done what you suggested and I am now signed in using Outlook (on outlook.live) but none of my gmail account emails show up. And when I try to log into the Outlook app on my computer using the outlook email (or gmail) , I get the notification that "You can't sign in here with a personal account. Use your work or school account instead." Any ideas on how to fix this.
EmilyS726 222.2K Reputation points Independent Advisor

2026-03-14T17:49:44.93+00:00

Your outlook.com interface will never sync your gmail emails. As I explained in my initial post, the web interface is not an email app, it cannot host other email addresses. It is only for Microsoft's native domain address, like outlook.com or hotmail.com. If others email you to this outlook.com address you just created, it will show up there. If others emails you to your gmail, it will only show up in gmail.com's web interface.

As for the outlook app, the gmail not working is currently an ongoing issue Microsoft is still investigating, see the link I shared above.

You can also consider using the New Outlook app for now to check your gmail. That seems to be working.
BartD 0 Reputation points

2026-03-14T17:56:14.47+00:00

Thank you so much!! I switched to New Outlook app and it now works!
EmilyS726 222.2K Reputation points Independent Advisor

2026-03-14T17:56:52.3933333+00:00

You are welcome.

Answer 2

The behavior matches two known Outlook.com issues:

The sign-in error for personal accounts in Outlook for Windows.
The mailbox showing as an "outlook_[long series of letters and numbers]@outlook.com" address.

Address both in this order:

Fix the "You can't sign in here with a personal account" error in Outlook for Windows

This is a known bug in Outlook for Microsoft 365 that is fixed in Version 2303 Build 16227.20202 and higher.
First, update Office to get the fixed build (File → Office Account → Update Options → Update Now). Once on a build that includes the fix, restart Outlook and sign in again with the Outlook.com account.

If updating is not yet possible, use the documented workaround:

Turn off Outlook Support Diagnostics, which disables the in-app "Contact Support" feature that is triggering the bad authentication.
Set this registry value under the Windows user that runs Outlook:
- Key: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Options\General
- Value name: DisableSupportDiagnostics
- Value type: REG_DWORD
- Value data: 1 (hex 00000001)
After setting the value, restart Outlook and try signing in again.
When Outlook is updated to a fixed build, remove this registry value so Contact Support works again.

Fix the strange "outlook_[letters-and-numbers]@outlook.com" address This indicates the Microsoft account is using a non-Outlook.com primary alias or a temporary/alias address, which causes Outlook.com to expose the internal outlook_[GUID]@outlook.com address and can break sending/receiving.

Use one of these workarounds:

Option A – Manually configure the account as IMAP/POP in Outlook

Close Outlook.
Press Windows Key + R, type outlook /profiles and select OK.
In "Choose Profile", select Options → New, give the profile a new name.
Choose Advanced options → Let me set up my account manually.
Select IMAP or POP and enter the server settings from the email provider or from the POP/IMAP reference in the article.
Finish setup, then in "Choose Profile" set this new profile as default and open Outlook.

Option B – Switch the primary alias to an Outlook.com/Hotmail.com address

Go to the Microsoft account alias management page (as described in the article) and sign in.
Set an Outlook.com or Hotmail.com address as the primary alias.
- If there is no such alias, create one using Add email and a new alias → Create a new email address and add it as an alias.
In Outlook for Windows, remove the Outlook.com account from the profile and add it again using the normal automatic setup.

After doing this, the mailbox should:

Show the correct Outlook.com address instead of the outlook_[letters-and-numbers] address.
Send and receive normally.

If problems persist after these steps, use the "Still need help?" options in the Outlook.com article to contact support, especially if the account or aliases may have been changed or removed.

References:

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Issue "You can't sign in here with a personal account. Use your work or school account instead"

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