Lotus Notes support - GMD supported the ingestion of Lotus Notes journals. Google Apps Vault does not support Lotus Notes.
Non-Standard Exchange Journal ingestion - Google Apps Vault will only accept standard RFC 822 mime/multipart journals with journal reports in text/plain or text/html mime parts. Vault will not accept journals in application/MS-TNEF file format, nor will it accept BCC forwarded messages to the journal address that’s not in wrapped in a journal format.
Alerts on Exchange Journals - Initially, Vault will not have capabilities to track Exchange Journal flow from a customer’s email server and alert the customer admins via email on events (for example, a sudden stop to mail flow, or a sudden change to misconfigured journals).
Exports as PST - GMD supported both MBox and PST exports. Google Apps Vault supports MBox only for email.
Saved search results - GMD supported the ability to save searches and save search results. Vault supports saving searches, but not results. To save results, users must export the data set or create a targeted legal hold (when available).
Message size - Google Apps Vault is built on Gmail. Gmail can accept messages up to 25MB in size, so users are limited to 25MB per message.
My Investigation - This feature is no longer supported. Users wishing to run searches for discovery or an investigation or to place a legal hold must create a matter in Vault. This is equivalent to running a search through a named matter in GMD, and Google will transition each users “My Investigation” to Vault.
Lookup - The GMD specific feature to look up a user’s address is no longer supported, but Vault still enables users to find specific IDs. Vault automatically looks up a user-ID as you type it in a the search box.
Company directory panel - In GMD, you could search for a user’s identity, which included all email addresses and aliases registered for that user on your message security service. This type of search is no longer supported in Vault.
Secure FTP transfer - GMD enabled secure FTP transfers of exports from the interface. Vault does not support this feature. However, in an upcoming release, Vault will enable you to manage exports in Drive, which will eliminate the need for FTP file transfers.
Manual archive purge - While GMD supported manual purging of the archive, Vault only supports an auto-purge of data from the archive. However, Vault will automatically reconcile multiple retention periods on a given document as well as any legal holds.
Sorting results by date, from, to, and subject - In Vault, sorting is limited to sorting results by date.
Mail flow search - The feature is being retired and is not included in Google Apps Vault.