If you’re a Postini Classic customer:
You use only Postini; you’re not using Google Apps.
You use an on-premise (non-Gmail) mail server.
If you’re a Postini Hybrid customer:
You’re a Google Apps customer who can route mail to on-premise mail servers.
In addition to Google Apps, you also use Postini message security or message discovery (archiving).
You log in to the Google Admin console and the Postini Admin Console with separate login credentials.
The transition for Postini Hybrid customers includes reviewing your Google Apps configuration and modifying it if needed, and routing your mail through Google after beginning the transition process. For more details, please go to: https://support.google.com/a/answer/2938980
Post Transition Issues
After the transition, your Postini archive data will be transitioned and there should be no duplicate data because the Postini to Google Vault transition tool recognizes duplicates. In the event that some messages are duplicated, however, you should be able to delete them from Vault by creating a custom retention rule which matches only that specific message.
If you decided not to do transitioning to Google Apps from Postini, then there is no transition tool available to migrate the data. If your Postini domain transitions to Google Apps then all of the Google Message Discovery(GMD) data will be transferred to the domain’s Google Vault automatically. The only other option beyond this is to export the Postini GMD data from your Postini Admin Console and then use Google Apps Migration for Microsoft Exchange(GAMME) to transfer it to Google Vault.
What About Cost?
The good news, as mentioned above, is that no matter which Postini service you are using, you won’t have to make extra payment for the transition. That means your price will remain same as what you are currently paying for your Postini service; you can use Google Apps and Vault service while saving up to 87% of the cost. If you are currently using Postini GMD service, you will be transitioned to Google Apps Vault. If you are using Google Message Security(GMS) service for your email spam filtering, you will be transitioned to Google Apps for Business. In addition to that, price for Google Apps Vault will stay the same until 2016.
To learn more about Postini transitioning, contact Netkiller at firstname.lastname@example.org or visit our website at www.netkiller.com. Netkiller is the Top Postini service provider in the Google Apps marketplace, and we have helped thousands of businesses to adopt Google’s Cloud Based Archiving Solution.