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Error: The underlying connection was closed: Could not establish trust relationship with remote server

Error Message

When connecting to ArcWeb Services using the toolbar the following error is returned:

The underlying connection was closed: Could not establish trust relationship with remote server.

Cause

Internet Explorer 6 is not installed or is corrupted.

Solution or Workaround

Install or reinstall Internet Explorer 6.

  1. Navigate to Start > Control Panel > Add/Remove Programs.
  2. If the version of Internet Explorer installed is lower than 6 (e.g., version 5), uninstall it.
  3. Download and install Internet Explorer 6 from
    Microsoft Windows Update.

    Note:
    If this does not resolve the problem see method 3 in the related Microsoft knowledge base article.

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