Most people know how to set the logging level from within Outlook to get the Enterprise Vault Outlook Addin to log more information. A few people start to rub their chin if they are asked to set it, when the EV buttons aren’t visible. The simple way is to edit the registry key manually :
HKEY_CURRENT_USER SOFTWARE KVS Enterprise Vault Client
Create/Set a DWORD called LoggingLevel and set it to 3.
Now start Outlook