When using Archive Shuttle to migrate legacy journal archive data an option (in System Configuration) can be used to change the type of message which is created in the target (the Office 365 mailbox).
By default the option is not selected.
If we take an example of migrating legacy journal data from Enterprise Vault to Office 365, with the option not selected it means that the P1 & P2 data is migrated as-is into Office 365.
If the option is selected then the P1 (envelope) information is added to a message attribute called GERP as the item is ingested into Office 365.
Considerations when enabling the option
There is no right and wrong way to use this option. Whether the option is enabled or not is up to the customer to decide. However the following things should be considered:
- If the customer wishes the items to be migrated much more as-is, ie matching the source system, then do not enable the option.
- If the customer wishes the items to be more inline with the way that Office 365 does this natively, then the option should be enabled.
- If you’re doing a Journal Transformation migration, then the option is enabled silently, and can not be disabled.
- When looking at emails from a compliance point of view, messages stored with the GERP attribute contain information about ‘who’ got the original email, but not the ‘why’ they got the email. (That information is stored in the P1 message, eg the message was sent to a distribution that contained a particular recipient)
- Office 365 works with either formatted message.
- Migrating data with the P1 & P2 data means that the P1 data becomes a free-text search, whereas enabling the option to convert the journal message (and adding the information to the GERP attribute) means it’s a fully indexed property of the message. Confusion can arise if a customer searches for ‘mails to X’, if P1 & P2 data is migrated, this type of query may return fewer results. Instead, the customer should perform a free-text search instead, but then it’s not possible to search for ‘mails o X’ in the same way.