When the Exchange Mailbox Policy Shortcut is Opened is set to Show Properties, the Click here to view the original item banner has no effect.
Workarounds exist for this issue, only one option below is required.
1. Change the Exchange Mailbox Policy to Show Contents.
2. Implement Virtual Vault.
3. Use the Enterprise Vault 8.0.5 client.
This issue has been resolved as part of the following release:
Enterprise Vault 10.0.1 - Release Details
Enterprise Vault 9.0.4 - Release Details