<div>
I would delete the Outlook Profile, make a new one and use the Exchange Account and Password.<br />
<br />
Control Panel, Mail, and delete the Outlook Profile. You need to know how to remake any Accounts. <br />
<br />
Restart. go back to Control Panel, Mail and make a New Account. Make it an Exchange Account. &nbsp;That should work
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<div>
Thanks, but nothing changes.<br />
It still asks for a Microsoft account and doesnt care about the pw.<br />
Also: the original .ost file was not deleted when I removed the profile, should I delete it?
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Deleting that old OST makes no difference. I also clicked the ost file and pointed Outlook to it but it couldnt open it.
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Either I add 'just' an account and then select &nbsp;Exchange or I add a Microsoft account, the problem remains.<br />
But according to CtrPanel/Access work or school &nbsp;I am connected
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<div>
First Office 2010 is not fully supported in Windows 10.<br />
<br />
1. Try full uninstall and reinstall of Office 2010.<br />
2. Try a new, test, Windows User Account. Log into the new Windows Account, set up Office and test <br />
3. Try a newer version of Office
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The earlier setups for Mail accounts gave more info, are they still available?
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Use the Setup Email Account found in Control Panel Mail. That gives more steps
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I've meanwhile installed Office 2019., and though I am not asked for a password anymore, the start of Outlook extinguishes with the message: 
<div class="indent">
Outlook cannot log on Verify you are connected to the network and are using the proper server and mailbox name. The Exchenage information service is missing required information. Modify your profile to ensure that you are using the microsft information service
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Theo

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Solved. This was the solution: <a href="https://appuals.com/solved-outlook-cannot-log-verify-connected-network-using-proper-server-mailbox-name/" rel="ugc">https://appuals.com/solved-outlook-cannot-log-verify-connected-network-using-proper-server-mailbox-name/</a>&nbsp;And then method2
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Thanks for thinking with me
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Thank you for the update and I was pleased to work with you.
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<div class="content wysiwyg-content">
I am trying to run Outlook 2010 on W10 and then connect to Exchange/Off365. &nbsp;<br />
<br />
I now collect my mail through &nbsp;W10 Mail and that works.<br />
<br />
When I start Outlook I am asked for my MicrosoftAccount pw, but it refuses that. I cannot change the account. &nbsp; When I cancel the procedure it reports that the Exchange connection is not available. and later I read &nbsp;that my profile is not configured,<br />
<br />
In 'Email and app acounts' &nbsp;I see the account with which Mail works and below that 'Accounts used by other apps' both my MS account and my work or school account (both have the same emailaddress. &nbsp;See the attached screenshot.<br />
<a href="https://filedb.experts-exchange.com/incoming/2018/12_w49/1406520/Capture.PNG" target="_blank" class="file-inline" title="Screenshot of my email and app accounts (13 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>Capture.PNG</a>
</div>
</div>


Capture.PNG

I am trying to run Outlook 2010 on W10 and then connect to Exchange/Off365.  

I now collect my mail through  W10 Mail and that works.

When I start Outlook I am asked for my MicrosoftAccount pw, but it refuses that. I cannot change the account.   When I cancel the procedure it reports that the Exchange connection is not available. and later I read  that my profile is not configured,

In 'Email and app acounts'  I see the account with which Mail works and below that 'Accounts used by other apps' both my MS account and my work or school account (both have the same emailaddress.  See the attached screenshot.

Outlook cannot find Exchange

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.