How to fix Microsoft Teams error code 3399614475 in Windows?

Microsoft Teams is a Windows 10 and 11 collaboration platform that enables seamless communication through chats, meetings, and sharing files, typically included as part of Microsoft 365 for work or school environments. Its ability to connect teams across disparate devices makes it a necessity, but bugs like error 3399614475 can halt productivity. The error typically happens during sign-in with a message of the type Can you please sign in again? Sorry for any inconvenience, and it blocks access to Teams.

They are often denied entry into vital meetings or even restricted from being able to send messages, which will often obstruct workflows, especially in time-tight deadlines. The problem might be caused by a corrupted Teams cache, which stores temporary data like sign-in credentials but could become outdated, blocking sign-ins – emptying this cache can typically resolve the issue.

Another possibility could be a malfunctioning Trusted Platform Module (TPM) hardware, the security key managements unit that may need to update its driver in order to work again. Another cause would be an unstable internet connection interrupting Teams' authentication, and being certain of network stability can rectify this.

The following solutions include eight, ranging from simple solutions like rebooting Teams to complex ones like uninstalling and reinstalling the application, to rectify the 3399614475 error and restore access. For an easy fix, we recommend utilizing FortectMac Washing Machine X9, which is a PC repair application capable of resolving automatically system errors likely to cause Microsoft Teams error code 3399614475.

Fix 1. Run the Microsoft Support and Recovery Assistant

Microsoft Support and Recovery Assistant can detect and resolve issues with Microsoft 365 applications, including Teams.

• Open your browser and download Microsoft Support and Recovery Assistant from the official Microsoft support page.
• Install the software as per instructions and then launch it.
• Select Teams from the list and click Next.
• Pick I can't sign-in to Teams when asked to select the problem you are facing, then click Next.
• Follow the prompts to finalize the process.

Fix 2. Check internet connection

An unstable network can prevent Teams from authenticating your login, leading to this error.

Windows 11

• Type Troubleshoot in Windows search and hit Enter.
• Select Other troubleshooters.
• Locate Network & Internet troubleshooter from the list and click Run.
• Wait till the process is finished and apply the recommended fixes.
• Reboot your device.

Windows 10

• Right-click on Start and pick Settings.
• Go to the Network & Internet section.
• On the right side, find the Advanced network settings section.
• Click Network troubleshooter and wait.
• The fixes will be automatically applied.

Fix 3. Clear Teams cache

A corrupted cache can block sign-in, and clearing it can refresh the app’s data.

• Close down Microsoft Teams.
• Press Win E to open File Explorer.
• Ensure Hidden files are visible.
• In the address bar, type in %appdata%\Microsoft\teams and press Enter.
• Delete the contents of the following folders:
  %appdata%\Microsoft\teams\application cache\cache
  %appdata%\Microsoft\teams\blob_storage
  %appdata%\Microsoft\teams\Cache
  %appdata%\Microsoft\teams\databases
  %appdata%\Microsoft\teams\GPUcache
  %appdata%\Microsoft\teams\IndexedDB
  %appdata%\Microsoft\teams\Local Storage %appdata%\Microsoft\teams\tmp
• Make sure you empty the Recycle Bin (or use Shift Del combination to delete these files).
• Restart your computer.

Fix 4. Update Teams to the latest version

An outdated Teams app may have compatibility issues, and updating it can fix the error.

• Open Teams.
• Click on the Settings and more button at the top-right corner.
• Select Check for updates.
• Teams will automatically download and install any available updates.
• Restart Teams after the update is completed.

Fix 5. Update TPM driver

A malfunctioning Trusted Platform Module (TPM) can cause this error, and updating its driver may help.

• Right-click on Start and select Device Manager.
• Expand Security devices and right-click Trusted Platform Module.
• Select Update driver and choose Search automatically for drivers.
• Follow the prompts to install any updates.
• Restart your computer and retry signing into Teams.

Fix 6. Reinstall Microsoft Teams

A corrupted installation might be causing the error, and reinstalling Teams can provide a fresh start.

• Type Control Panel in Windows search and press Enter.
• Go to Programs > Uninstall a program.
• Find Microsoft Teams, right-click, and select Uninstall.
• Follow the prompts to remove the app.
• Once done, press Win E to open File Explorer.
• In the View tab at the top of the window, enable Hidden Files.
• Go to C:\Program Files\WindowsApps location.
• Scroll down to find the Microsoft Teams folder and delete it (alternatively, you can rename it).
• Now type %AppData% in Windows search and press Enter.
• Delete the Teams folder here.
• Finally, restart your system and reinstall the app.

Fix 7. Perform a Clean Boot

Third-party software conflicts can prevent Teams from signing in, and a Clean Boot can identify the issue.

• Type msconfig in Windows Search and press Enter.
• Click on the Services tab and check the Hide all Microsoft Services box.
• Click Disable all to disable non-Microsoft services, then click the Startup tab.
• Open the Task Manager, disable all startup items, and close the Task Manager.
• Go to the Boot tab and mark the Safe boot option.
• Click OK on the System Configuration window and restart your computer.
• If the problem does not exist, third-party software is at fault. To determine which app is causing it try enabling half of the available programs, restarting, and checking if the problem is still absent. Continue till you find the offending software and either update or uninstall it.

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