How to Manually Enable Envelope Journaling
Besides using the exejcfg tool to enable envelope journaling, you can also manually enable envelope journaling.
Procedure
To manually enable envelope journaling
Use a directory modification tool of your choice, such as LDP (ldp.exe) or ADSIEdit (AdsiEdit.msc), to access the domain controller.
Browse to the Exchange organization object under Configuration, Services, Microsoft Exchange, Organization name.
Set the heuristics attribute on the Organization name by adding 512 to the existing value.