The good news is, if you don't need the full suite of Microsoft 365 tools, you can access a number of its apps online for free - including Word, Excel, PowerPoint, OneDrive, Outlook, Calendar.

• T-online Outlook 365 Einrichten
• T-mobile Office 365
• T-online Email Office 365 Einrichten

1. Microsoft 365 has all the familiar Office apps and more in one place. Work, learn, collaborate, connect, and create with Microsoft 365.
2. You'll use your Microsoft account for everything you do with Microsoft 365 or Office. If you use a Microsoft service like Outlook.com, OneDrive, Xbox Live, or Skype, you already have an account.
3. North Carolina A&T State University offers Microsoft Office 365 to all faculty and staff for email, chat, and productivity software. Report suspicious emails by forwarding them to InformIT@ncat.edu. Getting Office 365.
4. But it’s time to get rid of that. Modern authentication is safer and won’t go corrupt on you as an app password might. Use the Microsoft/Office admin portal to wipe the app password. Then open PowerShell connect to your Microsoft 365 tenant and use this cmdlet to enable Outlook for modern authentication.

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As of October 13, 2020, only these versions of Office are supported for connecting to Office 365 (and Microsoft 365) services:

• Microsoft 365 Apps for enterprise (previously named Office 365 ProPlus)
• Microsoft 365 Apps for business (previously named Office 365 Business)
• Office 2019, such as Office Professional Plus 2019
• Office 2016, such as Office Standard 2016

Examples of Office 365 services include Exchange Online, SharePoint Online, and OneDrive for Business.

For Microsoft 365 Apps, you must be using a supported version. For a list of which versions are currently supported, see Update history for Microsoft 365 Apps.

Important

We won’t take any active measures to block other versions of the Office client, such as Office 2013, from connecting to Office 365 services, but these older clients may encounter performance or reliability issues over time.

Impact of using older Office clients to connect to Office 365 services

After October 13, 2020, ongoing investments to our cloud services will not take into account older Office clients. Over time, these Office clients may encounter performance or reliability issues. Organizations that use these older clients will almost certainly face an increased security risk and may find themselves out of compliance depending upon specific regional or industry requirements.

Therefore, administrators should update older Office clients to versions of Office supported for connecting to Office 365 services.

Upgrade resources available to administrators

We recommend that you upgrade older Office clients to a subscription version of the Office client, such as Microsoft 365 Apps for enterprise. The most up-to-date subscription versions of the Office client are always supported connecting to Office 365 services.

We provide various services to help you upgrade to subscription versions of the Office client. The following list provides some examples of resources that are available:

• Microsoft FastTrack, for migration and deployment assistance from Microsoft experts.
• App Assure, for assistance from Microsoft with application compatibility issues.
• Deployment guide for Microsoft 365 Apps, for technical documentation.
• Product lifecycle dashboard and upgrade readiness dashboard, for users of Microsoft Endpoint Configuration Manager (current branch).
• Readiness Toolkit for Office add-ins and VBA, to help identify potential issues with add-ins and VBA macros used in your organization.

Upcoming changes related to connectivity to Office 365 services

Retirement of TLS 1.0 and 1.1

After October 15, 2020, you must be using at least TLS 1.2 to connect to Office 365 services. For more information, see TLS 1.0 and 1.1 deprecation for Office 365 and Preparing for TLS 1.2 in Office 365 and Office 365 GCC.

Basic authentication with Exchange Online

There are some changes planned related to the use of Basic Authentication with Exchange Online. For more information, see Basic Authentication and Exchange Online – April 2020 Update.

Retirement of Skype for Business Online

Skype for Business Online will be retired on July 31, 2021. For more information, see Skype for Business Online retirement.

Additional information about connectivity to Office 365 services

• Versions of Office 2019 and Office 2016 will be supported for connecting to Office 365 (and Microsoft 365) services until October 2023.
• Connecting to Office 365 services using Office 2016 for Mac isn’t supported. That’s because Office 2016 for Mac reached its end of support on October 13, 2020.
• This information about connecting to Office 365 services also applies to Project and Visio.
• This information about connecting to Office 365 services does not apply to InfoPath 2013 or SharePoint Designer 2013.
• For end of support dates for different versions of Office on various versions of Windows, see the Office configuration support matrix.
• To discuss or learn more about end of support for Office versions, visit Microsoft Office End of Support on the Microsoft Tech Community.

Topics Map > Features and Functionality > Client Capabilities > Desktop

If you are unable to sign into Microsoft Office (or Outlook repeatedly prompts you for login, does not show any data, edit a Word/Excel/PowerPoint data file, or receive encrypted connection error) it may be due to a NetID password change, a NetID change, or corrupted account credentials. Follow some common solutions to this issue below.

Possible solutions

• Option 1 - Update your software to the latest version

  • Windows OS

    Run Windows Update and install the latest updates.

    Windows Office

    Follow steps to update Office.

    Mac OS

    Run Office Updates.

• Option 2 - Your account was compromised and you are blocked from connecting
  • Review your client protocols. If your client protocols are disabled, contact the DoIT Help Desk.

T-online Outlook 365 Einrichten

• Option 3 - Reset/Remove your account credentials from within your OS

  • Windows OS

    Remove/Delete all Outlook/Office records from within credential manager.

    Mac OS

    Access the keychain application and remove/delete any of the following records: Microsoft Office Identities Cache 2 Microsoft Office Identities Settings 2 and any ADAL, Microsoft, or Office entries that are listed within the 'Name' or 'Kind' columns. Note: search for 'microsoft' and 'adal' within the keychain application and delete all returned results. Detailed steps.

• Option 4 - Delete license files - MacOS only
  • Remove license files on a Mac.

• Option 5 - You are not authenticated into Office using your UW-Madison Office 365 account
  • Confirm you are authenticated with your Office 365 account.

T-mobile Office 365

• Option 6 - If your computer is not connected to UWNET/Campus network, use WiscVPN

T-online Email Office 365 Einrichten

• Option 7 - Download and run Microsoft's Support and Recovery Assistant for Office 365

  • Windows OS

    Note: Only available for Windows. This tool must be run on the affected machine.

    Download the tool here: Fix Outlook and Office 365 problems with Microsoft Support and Recovery Assistant for Office 365.

• Option 8 - Delete Cached Preferences

  • Mac OS

    Note: Only available for Mac OS.

    • Outlook Desktop Client

      • Delete Cached Preferences

        1. Quit Outlook
        2. Open Terminal (click the Spotlight search glass in the top right corner and type terminal).
        3. Type: defaults delete com.microsoft.Outlook (to delete the old preferences).
        4. Type: killall cfprefsd (to kill the cached prefs).
        5. Quit Terminal.
        6. Launch Outlook and check.

• Option 9 - Sign out of the connected device associated with the Office email account
  1. Sign into the account: https://portal.office.com/account/.
  2. Select View apps & devices from within Office apps & devices module.
  3. Click DEVICES and sign out of all the devices that you are singed into. This will prompt the user to authenticate via NetID login on all the devices they are connected to via their Office 365 account.

• Option 10 - Fully uninstall and reinstall Microsoft Office

  • Uninstall Office

    Windows OS

    Review the following Microsoft documentation for instructions.

    Mac OS

    Review the following Microsoft documentation for instructions.

    Install Office

    Follow steps outlined in Office 365 - Download/Install Office 365 document.

Keywords:	microsoft office365 o365 reset 2016 2019 proplus windows mac outlook on the web credentials manager vault web service account updated changed stored send receive email login log on log in repeated repeating multiple attempts many lot times new error compromised client access loop repeat keychain netid password change An encrypted connection to your mail server services is not available repeatedly prompts data files profile excel powerpoint outlook word activated blocked account something went wrong and outlook couldn't setup your account Sorry, another account from your organization is already signed in on this computer troubleshooting doesn't allow editing on mac does not sync syncing connectSuggest keywords	Doc ID:	61054
Owner:	O365 S.	Group:	Office 365
Created:	2016-02-23 10:22 CST	Updated:	2020-09-09 14:13 CST
Sites:	DoIT Help Desk, DoIT Tech Store, Office 365, Wisc Account Admin
Feedback:	5163CommentSuggest a new document