MS 365 constantly switching among email acccounts

Question

MS 365 constantly switching among email acccounts

Anonymous

I am finding Microsoft Office 365 automatically switching among a few email accounts that is causing many problems. Here are the email accounts that I use:

******@domain.com (business account with MS 365 Enterprise)

******@outlook.com (Microsoft account, personal, email account)

I log in to the ******@domain.com account through Office.com and install Microsoft 365 Enterprise in Windows 11 Pro. Microsoft 365 Enterprise apps all activate and show the ******@domain.com account logged in (Word, Excel, Outlook). Microsoft 365 works fine at this point.

In Windows 11 Pro (Settings > Accounts > Email & accounts) there are two email accounts (******@outlook.com and ******@outlook.com). I use the New Outlook with these two email accounts. Both of these email accounts are just Microsoft Accounts for email and no active Microsoft 365 licenses in them. This has been set up in New Outlook for some time.

I have recently noticed that Microsoft Word/Excel keep toggling among these email addresses causing Microsoft 365 apps to de-activate (outlook.com accounts) and re-activate (need to login again using ******@domain.com). I am wasting more time always trying to keep Microsoft 365 apps activated than using Microsoft apps.

If I open Word, it may show the ******@domain.com account signed in. Later when I open Excel, the signed in account may show ******@outlook.com and Office de-activates. Once I re-activate Excel by logging in to the ******@domain.com account, it works.

When I then open Outlook that is configured to the ******@domain.com account, I find that all Office apps now show the correct email account logged in. This is correct, but once I close Outlook and later open Word or Excel, the logged in account may show either ******@outlook.com or ******@outlook.com.

How can I prevent Microsoft 365 constantly switching among these email account and just keep ******@domain.com account logged in to Microsoft 365? This is causing many problems, including OneDrive switching among these accounts.

Note that whenever I log in to Microsoft 365 or Microsoft Accounts, I select to use the account(s) with 'Microsoft apps only' as I do not want the logged in account to dominate the entire system. Both the ******@outlook.com and ******@outlook.com account should never need to login to Microsoft 365 apps for anything as they do not have Microsoft 365 licenses. These are just email accounts.

Updated info:

I forgot to include that if I remove the email accounts that appear in Windows 11 Settings > Accounts > Email & accounts section, this removes the email accounts in New Outlook. Once I re-add the email accounts back in to New Outlook, the email accounts appear back in the Windows 11 Settings > Accounts > Email & accounts again. I have gone around and around many times and I can never get this corrected. I have tried many registry modification including gpedit mods with no success. Seems like Microsoft has this very well broken from their anti-piracy tracking with grabbing active and inactive Microsoft accounts.

There is an old Hotmail account that has been closed for nearly ten years that Microsoft is suddenly wanting me to re-authenticate and I cannot do so. Microsoft closed this account a long time ago for whatever reason. Then in Windows 11 this closed Microsoft accounts gets tied to Microsoft 365 and Windows 11 automatically. Luckily I am able to catch this update and undo it before it locks me out of everything. With all the registry edits, gpedit edits, and logging in/out of accounts with always re-authorizations, I am fed up with this entire mess. Microsoft has totally screwed up something.

This has never been a problem in the past and wondering what has changed in Windows 11 and/or Microsoft 365. This frustration is making me feel like Microsoft 365 is no longer worth the hassle. I could use Google Docs instead, but I am trying to figure this unusual problem.

Thanks.

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2 answers

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Answer 1

Anonymous

1. Remove all accounts from windows settings

Navigate to Settings > Accounts > Email & accounts.
Under Accounts used by other apps, remove all accounts include Business and Personal. Note: This may also remove them from New Outlook. If you rely on them for email, consider using them in a browser or a separate profile.

Correct, this removed my Outlook.com account from the New Outlook. I used to normally use it through the web browser and Microsoft kept showing a notification to use the New Outlook app instead.

2. Clear Windows Credentials: [...] 3. Disconnect Work Account:

I have cleared all entries numerous times all with the same result back. Microsoft 365 makes me re-login back in to these accounts, re-authenticate, and this entire disaster is back again.

4. Sign In Again: Sign in only Business account. About Outlook, I strongly recommend you using Classic Outlook

In Outlook Classic I have the business email account set up and no problems. It seems once I set up and used the business email account in Outlook Classic, this triggered Microsoft 365 apps to constantly switch among the other personal accounts and business account.

Microsoft 365 apps would somehow pull in other old [closed] accounts that I haven't used for years and uses the email account for Microsoft 365. The account never had Microsoft 365 in that email account. Where is Microsoft getting the other email accounts for Microsoft Accounts when they have never been used on any of my computers for years?

I read somewhere on Microsoft web site that the AI searches throughout your history, currently or archived in Microsoft servers, and possibly pulling in these accounts and information. Apparently my cell phone number is still in these accounts, but I cannot access nor authenticate them because Microsoft closed these accounts.

Somehow Microsoft Copilot shows my very old msn.com email account for a login, only for Copilot, and that account has not been used for decades. Microsoft's AI technology sure is pulling in old data and accounts that should have been deleted years ago.

Anyway, all these steps still does NOT correct the Microsoft 365 problems. Multiple old and current accounts switching on its own and constantly trying to correct things are very time consuming.

Anonymous

2025-10-05T12:45:51.77+00:00

For the people/users I have been helping to correct this Microsoft Account behavior problems that I also experienced.

Switched everyone over to using LibreOffice (free, no subscriptions), removed OneDrive including any other cloud drives. There is no need for a Microsoft Account or other online accounts. Due to Outlook Classic and New Outlook constantly adding email accounts to Windows 11 Settings > Accounts > Email & accounts causing MS 365 apps to constantly switch Microsoft Accounts, switched everyone over to Mozilla Thunderbird and Mozilla Firefox for lessening the frustration.

All these Microsoft Windows 11 modifications to the registry, Accounts, settings, etc. was too much to constantly do. Windows should not be a high maintenance OS.

So far the 'switch' that was made did some great improvements. Also in Windows 11 we removed a lot of the useless software (aka pre-installed apps) and increased the performance of Windows 11 some.

Removing Copilots apps in Windows 11 made a big difference. If needed, these users may browse to Copilot on the web and search for their information. For what their uses, web version is good enough. They also are Google Gemini among the others available.

Eliminating the Microsoft 365 integration of the apps and constant correcting these problems has boosted their productivity and reduced the stress levels.

Another option of change had been mentioned, but eliminating this mess mentioned above had a positive effect. Linux usage had been mentioned, but that is something else entirely different.

In this situation, this 'switch' work for these people/users.
Vicky-I 6,330 Reputation points Microsoft External Staff Moderator

2025-10-07T15:10:20.3333333+00:00

Dear @mark k,

Thank you so much for taking the time to share such a detailed explanation and for your patience throughout this process. I can completely understand how frustrating this must be, especially after you’ve already tried so many steps on your own. It’s clear you’ve put in a lot of effort, and I truly appreciate the depth of your feedback because it helps us see the real impact this issue is having on your work.

From everything you’ve described, this doesn’t seem like a simple local configuration problem. It’s very likely related to how Microsoft 365 and Windows 11 handle multi-account authentication after recent updates. There may also be some backend token or account indexing behavior involved, which unfortunately isn’t something we can fully control from the user side. That said, there are a few advanced steps that can help reduce the constant switching and make your business account the primary one.

The best next move is to open a support ticket at https://admin.microsoft.com/#/support/requests. The reason I suggest this is because the problem may involve backend synchronization or token refresh logic, which only the engineering team can investigate. They can also check if there’s an ongoing service-side issue affecting multiple users, as you mentioned others are experiencing the same thing.

I completely understand why this situation has been so disruptive and why you’ve considered moving away from Microsoft 365. In the meantime, to ensure this gets prioritized by the product team is to submit feedback through the official Microsoft Feedback Portal. The more votes and comments an item receive, the higher its visibility and priority. Here’s the link: https://feedbackportal.microsoft.com/feedback

If you share the link to your feedback here, others in the community (including myself) can upvote it to help bring more attention to the issue.

Thank you again for your persistence and for sharing your experience so openly. It really helps us understand where improvements are needed. If you’d like further assistance, feel free to create a new post on this Q&A Forum, we're always here to support you as much as possible.

Warm Regards.

Answer 2

Vicky-I 6,330 Microsoft External Staff Moderator

Hello @mark k,

Thank you for reaching out to Microsoft Q&A.

I’m here to help clarify what’s happening and guide you through steps to stabilize your setup. Please follow my suggestions below:

1. Remove all accounts from windows settings

Navigate to Settings > Accounts > Email & accounts.
Under Accounts used by other apps, remove all accounts include Business and Personal.

Note: This may also remove them from New Outlook. If you rely on them for email, consider using them in a browser or a separate profile.

2. Clear Windows Credentials:

In the Windows search bar, type Credential Manager and open it.
Go to Windows Credentials.
In the Generic Credentials section, remove any credentials related to Office, Outlook, Teams, or Microsoft Office.
In the Web Credentials section, clear the cached credentials for Microsoft-related accounts.

For more details, please check this reference: Credential Manager in Windows - Microsoft Support

3. Disconnect Work Account:

Go to Windows Settings > Accounts > Access work or school.
If your organization's account is listed, select it and choose Disconnect. Restart your PC if prompted. For example (your Disconnect button will blue, not grey like my environment test):

User's image

4. Sign In Again: Sign in only Business account.

About Outlook, I strongly recommend you using Classic Outlook and set up by following these steps:

Go to Control Panel > Mail > Click Mail (Microsoft Outlook)
Click Show Profile:

User's image

Add new profile account (Remember to tick Always use this profile):

After that, go to Classic Outlook > Add account you have created and another accounts.

We appreciate your kind patience and understanding that sometimes the initial response may not immediately resolve the issue or there may be some misunderstandings about your scenario, but we would love to hear updates from you and find out further suggestions.

Warm Regards.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

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Anonymous

2025-09-24T16:30:03.09+00:00
1. Remove all accounts from windows settings

Navigate to Settings > Accounts > Email & accounts.

Under Accounts used by other apps, remove all accounts include Business and Personal. Note: This may also remove them from New Outlook. If you rely on them for email, consider using them in a browser or a separate profile.

Correct, this removed my Outlook.com account from the New Outlook. I used to normally use it through the web browser and Microsoft kept showing a notification to use the New Outlook app instead.

2. Clear Windows Credentials: [...] 3. Disconnect Work Account:

I have cleared all entries numerous times all with the same result back. Microsoft 365 makes me re-login back in to these accounts, re-authenticate, and this entire disaster is back again.

4. Sign In Again: Sign in only Business account. About Outlook, I strongly recommend you using Classic Outlook

In Outlook Classic I have the business email account set up and no problems. It seems once I set up and used the business email account in Outlook Classic, this triggered Microsoft 365 apps to constantly switch among the other personal accounts and business account.

Microsoft 365 apps would somehow pull in other old [closed] accounts that I haven't used for years and uses the email account for Microsoft 365. The account never had Microsoft 365 in that email account. Where is Microsoft getting the other email accounts for Microsoft Accounts when they have never been used on any of my computers for years?

I read somewhere on Microsoft web site that the AI searches throughout your history, currently or archived in Microsoft servers, and possibly pulling in these accounts and information. Apparently my cell phone number is still in these accounts, but I cannot access nor authenticate them because Microsoft closed these accounts.

Somehow Microsoft Copilot shows my very old msn.com email account for a login, only for Copilot, and that account has not been used for decades. Microsoft's AI technology sure is pulling in old data and accounts that should have been deleted years ago.

Anyway, all these steps still does NOT correct the Microsoft 365 problems. Multiple old and current accounts switching on its own and constantly trying to correct things are very time consuming.
Vicky-I 6,330 Reputation points Microsoft External Staff Moderator

2025-09-26T15:32:47.8466667+00:00
Hello @mark k,

Thank you for the detailed update and for trying the steps I previously suggested, it’s clearly costing you a lot of valuable time.

Just to make sure I can assist you right of your issue, I wanted to gently clarify the approach: we need to complete all the previous steps sequentially. We're essentially doing a full system clean-out to clear up all the confusion and force your business account to take priority.

The main goal is to force your computer to forget all the confusing accounts and only remember the one you pay for.

System Cleanup (Steps 1, 2, and 3): This is like completely wiping the login details from your PC. When you remove accounts from Settings, clear the Credential Manager, and disconnect the work account, you make the machine forget the personal and old accounts that are trying to take over.

Make Business Account the Boss (Step 4): Since the system is now "empty," you must sign in with only your business account first. This tells Microsoft 365: "This is the main, paid account, so always use this one."

For Outlook, using Classic Outlook with a new Profile is the best way to keep things stable:

It's a more reliable system that locks in your business account.

This prevents the personal accounts from jumping in and messing up your work email and your Microsoft 365 license.

These steps are the strongest way to stop the switching problem on your end, even if Microsoft has issues on their servers with pulling up old accounts.

I acknowledge your observation about old, closed accounts being pulled in, which points to a deeper server-side data issue likely linked to Microsoft's AI systems. While the steps above won't fix Microsoft's server-side data hoarding, they are the best available method to locally fight the confusion and enforce your business account's primacy.

Please let me know if following these steps sequentially resolves the problem, or if the system still attempts to force the old accounts back in. We will continue to explore this.

Warmest Regards.
Vicky-I 6,330 Reputation points Microsoft External Staff Moderator

2025-09-27T15:00:23.9333333+00:00

Hello @mark k,

Just checking in to see have you had a chance to check the replies provided? If you have any further updates on this issue, please feel free to post back.

Warmest thanks.
Vicky-I 6,330 Reputation points Microsoft External Staff Moderator

2025-09-30T14:15:43.6933333+00:00

Dear @mark k,

I hope this message finds you well.

This is my second follow-up to check whether your issue has been resolved. I truly want to ensure your experience is as smooth as possible. If your problem is still ongoing or if you have faced any new difficulties, please share more details about the current steps you are stuck on. I am here and happy to provide further help whenever you need it.

While waiting for your response, I will continue tracking other customer questions on the forum to ensure everyone receives timely support. If you have additional questions, please feel free to tag my name in your reply so I can assist you promptly and more personally.

Looking forward to hearing from you soon.
Anonymous

2025-10-01T21:11:51.76+00:00

I am still having the same problems and it seems other Microsoft 365 subscribers are experiencing the same issue. Seems like it is a dead-end issue to try to resolve. Microsoft just does not correct their existing problems before adding on more problems.
Vicky-I 6,330 Reputation points Microsoft External Staff Moderator

2025-10-03T15:18:29.9766667+00:00

Dear @mark k, I'm so sorry for the inconvenience this issue has cause and thank you so much for your understanding and cooperation until now.

I understand that you try all my suggestions in my answer before, but the issue still persists, please try to add a Window User Account based on this reference:

Sign in to your business account again and check if the issue still persists or not.

If you still having the problems, I strongly recommend you raise a Microsoft Support Ticket via https://admin.microsoft.com/#/support/requestsbecause our technical team can contact you directly via call or meeting to troubleshoot issue faster.

As a moderator, I want to make sure guide you toward the most appropriate support path. Since this issue may involve backend account indexing or server-side synchronization, areas I unfortunately cannot access.

Thanks again for your understanding and I really hope this issue can be resolved soon!

Best Regards.
Anonymous

2025-10-03T21:23:15.4766667+00:00

I have already tried re-creating the Local User account in Windows 11 and actually have re-installed Windows 11 on the computer several times, all with the same results. It all works good up to the point where I use the business email address in Outlook Classic. Something there triggers the constant switching between the personal accounts and business account.

As I told stated earlier, I already did various searches finding many other users experiencing the same problem. This authorization handling is broken or messed up where Microsoft has to correct it. But Microsoft isn't interested in fixing things, just more interested adding features and causing more problems. Thus, leaving support people barring the frustration of not able to make things better for the end user.

Trust me, I know what I am doing. I have found this problem existing on many different computers in many different environments, that I can see the problem, just don't know to correct it.

After the most recent updates in Windows 11 and MS Office 365, I noticed a change in handling authenticated accounts. Seems like if you completely log out of one Microsoft Account (person or business) in all apps, clear the cookies in MS Edge while the Microsoft Account remains logged in for sync purposes, and then log in to the other Microsoft Account allowing it to update in all apps (not sure why it automatically does this auto-authentication), the current logged in account does not switch right away. Once you try to access something linked to the previous logged out account and it automatically logs back in for that account, then the back-and-forth switching of accounts occur. This also causes account problems where Microsoft sends you warning of abuse or violations. I guess the Microsoft Account in the back-end is bouncing between the account causing that to occur.

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MS 365 constantly switching among email acccounts

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