Dear Emirhan,
The error you're encountering with the tag 4wbr5, error code 2147943811, and correlation ID 6ad51176-***-467f-****-264d******36c5 is often related to issues with Outlook's authentication and identity cache.
Please follow the steps below to troubleshoot and resolve the issue:
- Clear OneAuth and IdentityCache Folders:
- Close all Microsoft applications (such as Office, Teams, OneDrive, etc.).
- Search for %AppData% in the Windows search box and navigate to the Microsoft folder (C:\Users<yourusername>\AppData\Local\Microsoft).
- Cut the OneAuth and IdentityCache folders out of the Microsoft folder and paste them onto your desktop.
- Relaunch Outlook and sign in.
- If the issue persists, close Outlook, copy the OneAuth and IdentityCache folders back into the Microsoft folder, and when prompted to overwrite, select "No". Relaunch Outlook and sign in again.
- Repair Office:
- Go to Control Panel > Programs > Programs and Features.
- Select your Office installation and choose "Repair".
- Follow the prompts to complete the repair process.
- Clean Up Temporary Files:
- Open Start > Run and type the following locations one by one, pressing Enter after each:
- C:\Windows\Temp
- %USERPROFILE%\AppData\Local\Temp
- Delete the files in these folders.
There may be instances where third-party add-ins are contributing to the issue. To confirm this, please start Outlook in Safe Mode by pressing the Windows + R keys, typing Outlook.exe /safe, and pressing Enter. If Outlook operates without any problems in Safe Mode, this may indicate that one or more add-ins are responsible for the issue. To identify the specific add-in causing the problem, please disable them one by one and check for the issue after each one.
Have a great day and take care! 😊
Sincerely,
Naren | Microsoft Community Moderator