When a user running the Enterprise Vault 9.0.3 or 10.0.1 or later Add-Ins with Outlook 2007 or 2010 clicks on Archive Explorer or Search Vault, they get a blank white page.
This is caused by a change in how the 9.0.3 and 10.0.1 add-ins generate links to Archive Explorer and Search.
Verify that the Internet Explorer > Internet Options > Security > Local Intranet > Custom Level > "Websites in less privileged web content zone can navigate into this zone" setting is not set to Disable or Prompt. If it is, set it to Enable and test Outlook again.
This issue can also be verified if the Outlook 9.0.2 or 10.0.0 or earlier Add-Ins allow access to Archive Explorer or Search, but the newer versions do not.