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October 3, 2025 at 4:01 am #15737
For all of my Office 365 clients, including my own setup from the Action Pack, Modern Authentication is enabled. I have run into multiple Outlook 2016 installations where the only way to get connected to Outlook is to add EnableADAL and set it to 1. These have been fresh Office 365 Business Premium installations, existing Office 2016 OEM installations, and on my Action Pack installation of Office 2016. Try testing the configuration of your Office 365 email system and fix the problems that are preventing users from using the email services.
Common Office 365 Issues and How to Solve Them
To avoid data loss when using cloud applications, perform Office 365 data backup. NAKIVO Backup & Replication is a universal data protection solution that can protect not only Office 365 but also virtual, physical, and cloud environments. Download the software and configure data backup in your environment. The issue the users face is Teams or Outlook just refused to log in.
How to fix Office 365 issues related to synchronization
Read the blog post about using Office 365 on a terminal server.Get a free trial to explore all the solution’s data protection capabilities.Safari can cause Microsoft 365 issues due to the Intelligent Tracking Prevention (ITP) feature.You can unintentionally send an important Microsoft 365 item to the recycle bin, especially if you have too many files on your device’s hard drive.Microsoft Support and Recovery Assistant can help you resolve problems with Microsoft Office, Office 365, and Outlook.Make sure that network access to the Microsoft servers is not blocked.
We enabled it thinking that would fix the problem, but sadly no. If you are having a lot of Outlook troubleshooting steps end-user support headache because of Office365 quirkiness… well, it may very well be because this rather critical module is missing. We haven’t identified WHY it is missing for some user Win10 installs and not others yet. OneDrive issues are a separate category of problems with Microsoft 365.
How do you repair Microsoft Office? <br><br>
Outlook 365 not recognizing my Microsoft 365 login when adding emails
If your Office 365 subscription has expired, buy a new license and extend your subscription for a new period. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. But as soon as i log out and log back in, the plugin desactivates itself and the authentication bug comes back. Get a free trial to explore all the solution’s data protection capabilities. Domain verification issues can also prevent the normal use of the Microsoft Office 365 suite.
Domain Verification Issues
In this case, consider using safe mode, which is useful for Office 365 troubleshooting. An internet connection is not available or a firewall is blocking network connections. Installing Office 365 updates can fail for different reasons, and some of them are listed below.
Office 365 won’t log in without EnableADAL = 0
Microsoft recommends updating Windows, Microsoft Office and other software regularly. Microsoft updates are released on a regular basis and allow you to protect software against known threats, fix bugs, and so on. Let’s find out what you can do if updates are not installed automatically, and what factors can cause update issues. Reboot your system and try to launch your Outlook app after to check if the synchronization issues are solved.
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