Microsoft error during installation or update of Secure Exchanges
Microsoft Office may display an error message when installing or updating the Secure Exchange Connector in Outlook. In most cases, this problem is caused by a corrupted local cache used by Microsoft for installed applications.
This error originates from Microsoft Office (ClickOnce) and not from Secure Exchanges.
Here's how to fix the problem:
Before following the procedure below, ensure that Microsoft Outlook is completely closed.
1. Close Outlook
Completely close Outlook and make sure it is no longer open in the taskbar.
2. Open the Run window
Press the Windows + R keys simultaneously.
3. Access the Microsoft cache folder
Copy and paste the following path into the window that appears, then click OK :
%userprofile%\AppData\Local\Apps\2.0 4. Delete the contents of the folder
- Select all the folders present
- Right-click, then click Delete
This step clears the Microsoft ClickOnce cache , which is often responsible for this type of error during updates or a new installation.
5. Reopen Outlook
- Restart Outlook normally.
- The Secure Exchanges connector should now install or update correctly.
Microsoft article addressing this issue: ClickOnce application fails to update - .NET Framework | Microsoft Learn
Related Articles
Microsoft Office error during Secure Exchanges update (ASR blockage)
1. Context Microsoft Defender includes a security rule called "Block executable content from email client and webmail" that blocks executable content from email clients. This rule blocks all content considered executable when it originates from an ...Install and activate Secure Exchanges for Outlook
Identify your version of Outlook This procedure applies only to Outlook Classic users. If you are using Outlook Classic instead: The New Outlook, or Outlook Web (browser) You must follow this procedure: How to install and activate Secure Exchanges on ...Configure Secure Exchanges in Outlook
Secure Exchanges offers several configurable settings directly within Outlook to tailor the security level, sending behavior, and signature management to your needs. This article explains each settings tab , specifying its purpose and how to use it. ...Sign a document in Microsoft Outlook using Secure Exchanges
This article explains how to send a PDF document for signature with Secure Exchanges directly from Microsoft Outlook, from creating the email to defining the signature areas. Prerequisites Before you begin, make sure you have: The Secure Exchanges ...Error adding a signature file or document with Secure Exchanges
If an error occurs when you try to attach a file or document for signature in an email protected by Secure Exchanges, it usually means that the file is already being used by another application or is temporarily blocked by your antivirus software. In ...