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open 0365 (or azure) portal and verify the users account is there and is listed as a synced account.<br><br>if yes, then have a look in AADConnect and verify there are no errors.
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Bert2005

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Hello Bert2005<br><br>Thank you for your question.<br><br>The 1st thing that we need to know is "what's your infrastructure"?<br><br>Since the other 10 are working, we will assume the following:<ul><li>You have an Internal Domain controller running a windows server.&nbsp;</li><li>You have installed Azure AD Connect</li></ul><br><br>And from here the several questions:<ul><li>What's the version of your domain controller (Windows server 2019/2016/2012)</li><li>What's the version of Azure AD Connect</li><li>Do you have Azure AD premium licenses? (they're required for the PAssword writeback.</li></ul>
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The VMs are running Windows Server 2016 Standard, one being Essentials. I am not sure if I have Azure AD connect. Active Director and domain controller are on Windows Server 2016 Standard. The Hyper-V is 2019. <br><br>I have E3 licenses for all the users. <br><br>Thank you. I am perfectly fine with trying to find the version and look for Azure AD Connect.
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Worked like a charm after a couple of beers! Thanks.
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Excellent bert2005 glad to help!
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I have a user who has a username and password to log into the domain. This works fine. The same username and password should (as it does on the other 10 users) log into Microsoft 363. But, it doesn't. It says the password is incorrect.<br><br>I guess it doesn't matter, but this is when the windows pops up and you choose your work account, type in your email address, click enter. It takes you to the next screen and you get the password screen. Here is where it doesn't work. There is a reset password, but then it seems she would have two accounts to remember to access email and other things on M365.
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I have a user who has a username and password to log into the domain. This works fine. The same username and password should (as it does on the other 10 users) log into Microsoft 363. But, it doesn't. It says the password is incorrect.
I guess it doesn't matter, but this is when the windows pops up and you choose your work account, type in your email address, click enter. It takes you to the next screen and you get the password screen. Here is where it doesn't work. There is a reset password, but then it seems she would have two accounts to remember to access email and other things on M365.

User cannot log in to Microsoft 365

Microsoft is best known for their Microsoft Windows line of operating systems, the Microsoft Office suite, and the Internet Explorer and Edge web browsers. Microsoft's mission is to "enable people and businesses throughout the world to realize their full potential by creating technology that transforms the way people work, play, and communicate.” Currently, the Windows operating system created by Microsoft powers over a billion devices around the world. On top of their share in the software creation market, Microsoft manufactures hardware, including laptops, phones, and attachments.

Microsoft

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.