Not sure if this is the right forum to post, but here goes:
If you go to the URL: https://support.symantec.com/en_US/enterprise-vault-ms-exchange.50996.html
you'll get the mainpage for the KB entries for Enterprise Vault.
at the top are 3 'sticky notes'. the middle one reads Sym Help Diganostics
That should be Sym Help Diagnostics