Default Office Add-in image displayed in the Outlook Ribbon

Symptoms

In Microsoft Outlook 2013 or Outlook 2016, the default Office Add-in image is displayed in the Outlook Ribbon instead of the actual Office Add-in image.

For example, this screenshot shows the default icon for Share to Teams and Reply with Meeting Poll Office Add-ins:

This screenshot shows the expected icon for Share to Teams and Reply with Meeting Poll Office Add-ins:

Cause

The Internet Explorer Security setting Do not save encrypted pages to disk option is enabled.

Resolution

Disable the Internet Explorer Security setting Do not save encrypted pages to disk:

1. Exit Outlook
2. In Windows, open Internet Options and select Advanced tab.
3. Under the Security heading, clear the Do not save encrypted pages to disk option.
4. Select OK.
5. Start Outlook.

If you can't disable the option, it's managed by a Group Policy. Contact your system administrator to determine the appropriate configuration for this setting.

More information

The Do not save encrypted pages to disk setting is managed by the following registry keys:

• Without Group Policy:

  HKEY_CURRENT_USER\software\microsoft\windows\CurrentVersion\Internet Settings  
  DWORD: DisableCachingOfSSLPages  
  Value: 1
  

• Group Policy:

  HKEY_CURRENT_USER\software\Policies\microsoft\windows\CurrentVersion\Internet
  DWORD: DisableCachingOfSSLPages
  Value: 1
  

• All users on a computer:

  • 32-bit Office installed on 32-bit Windows, or 64-bit Office installed on 64-bit Windows:

    HKEY_LOCAL_MACHINE\software\microsoft\windows\CurrentVersion\Internet Settings
    DWORD:DisableCachingOfSSLPages 
    Value:1
    

  • 32-bit Office installed on 64-bit Windows:

    HKEY_LOCAL_MACHINE \software\Wow6432Node\microsoft\windows\CurrentVersion\Internet Settings
    DWORD:DisableCachingOfSSLPages
    Value:1