How to Fix Yellow Triangle with Exclamation Point in Outlook? – Problem Solved

Ritu Roy | File Repair fix How to's Outlook Software Technology | 4 minutes read | Last updated on July 17th, 2023,

When your Outlook icon displays a yellow triangle exclamation point, this indicates that there are problems with your MS Outlook or that it cannot establish a connection. It is a warning signal, to be exact. These indications could manifest for one of the following reasons:

  • Your setup for Microsoft Outlook is incorrect.
  • It is impossible to open a corrupted outlook data file.
  • The MS Outlook profile cannot be synchronized by the server.
  • Adware or a viral attack could be one cause.
  • As soon as the MS Outlook subscription expires

If none of the abovementioned reasons apply to you and you don’t want to recover the Outlook data file by saving OST to PST, look into your alternative options. Knowing the cause of this and how to fix it will be helpful.

How to Identify a Yellow Triangle and What Is It?

Well, the yellow triangle commonly works as a warning symbol. It indicates that there is a problem, so you should look into it. This symbol can be seen everywhere around you.

However, it is displayed on the MS Outlook application’s recognizable blue logo symbol. This indicates that your profile isn’t operating properly, so you should take the required steps to fix it when it displays on your Outlook icon.

Possible Reason of Yellow Triangle in Outlook?

A possible cause of a yellow triangle with an exclamation point in Outlook is a security warning indicating that the email message contains potentially unsafe or suspicious content. This warning is designed to alert the recipient to exercise caution when interacting with the message or its contents. Here are some specific reasons that may trigger the yellow triangle warning:

  •  Unsafe Attachments: The email may include attachments that are flagged as potentially malicious or harmful, such as executable files (.exe) or files with known malware signatures.
  • Suspicious Links: The email may contain hyperlinks that lead to suspicious or phishing websites. These websites could attempt to collect sensitive information or install malware on the recipient’s computer.
  • External Content Blocking: Outlook’s security settings may be configured to block the automatic loading of external content, such as images, scripts, or active content, in email messages. The yellow triangle warns that some content within the message has been blocked for security reasons.
  • Untrusted Sources: The email may originate from a sender or domain that is marked as untrusted or blacklisted. This can happen if the sender’s email address or domain has a history of sending spam or malicious content.
  • Invalid Digital Signatures: If the email message is digitally signed but the digital signature cannot be verified or is deemed invalid, the yellow triangle may appear to alert the recipient that the message’s authenticity or integrity cannot be guaranteed.
  • Encryption Issues: In cases where the email message is encrypted, the yellow triangle can indicate issues with the encryption process or decryption on the recipient’s end. This could be due to problems with the encryption certificate or compatibility issues with the encryption method.

How Do I Remove the Yellow Triangle Exclamation Mark From the Outlook Icon?

You can take the appropriate steps to remove this warning based on the potential causes we outlined above. You must try every alternative that might be effective in your situation because there isn’t a guaranteed 100% solution for this.

Take a backup of your MS Outlook data before you begin this method, it is highly advised. You can still access your data if something goes wrong with your profile because it is in PST or OST file type. However, if MS Outlook is set up to work with MS Exchange and is displaying the Yellow warning flags, you should back up the OST file as a PST file and store it to your computer.

Consequently, the following is a list of every technique you can use:

Close any Outlook add-ins and extension programs. because of Navigate to File > Manage Add-ins > To remove all of your preferred extensions, click the dotted icon, followed by the remove option.

Analyze your internet connection. It’s very conceivable that your network or WiFi is disconnected. Perform a speed test on your local network to see if your connection is secure for this.

Another explanation for this signal can be corrupt data files. You must repair the Outlook data file to accomplish this. Manual work is possible here. However, if the free Outlook inbox repair tool is ineffective, consider recovering Outlook data files with a third-party Outlook repair program.

Try to uninstall the server from which you want Outlook to connect. To do this, click to Account settings and choose the desired server. Return to the home screen and attempt to log in once more with the proper information.

All of the abovementioned steps might totally address the problem. However, it is advised to delete MS Outlook and reinstall it if you are still experiencing problems. Reconfigure it, then allow the server to synchronize the information with Outlook. By doing so, a new data file with all the information restored safely will be created.


Outlook errors are a prevalent problem, and many error messages might appear. One of those problems that can be quickly fixed by referring to the abovementioned tips and approaches is the yellow trial issue. You can learn how to fix Outlook issues for any further types. Given the popularity of Outlook, there are several tutorials, manuals, and other resources online that may provide you all the knowledge you need.