How to Import OST to Gmail Account using Gmail GAMMO


Description- Do you need to Import OST to Gmail? Get the best way to Migrate Outlook .ost to Gmail by using GAMMO Tool to back up the complete OST file to Gmail via PST.

Import OST to Gmail: Necessity and Methodology

MS Outlook, considered one of the most effectual email client that gives the provision to work in synchronization with Exchange Server to its users. Whilst working in synchronization with Exchange, Outlook stores the entire data in a data file known as OST file. This OST file contains a replica of the entire data that resides on the server and in addition, facilitates the users to work in an offline mode with the Exchange. To put it in simple words, OST file ensures offline availability of the Exchange Server data.  Similar to other data files, OST files are also prone to corruption. Due to which, most of the users need to migrate OST to Gmail. As Gmail, from the house of Google, is one of the services, which have proved to be a milestone in its success. In this blog, we will focus on the scenarios, which lead to import OST files to Gmail using Gmail GAMMO.

Necessity to Migrate OST to Gmail Account

Gmail being a web based email client gives its users the freedom to access the account from anywhere the users can access their mails irrespective of the machine they are using or location they are based in. However, it is difficult to access OST file on other machine rather than on which it is configured. Moreover, for using OST file proper Exchange connectivity is necessary. Therefore, users need to import their data from OST to Gmail.

Methodology to Import OST to Gmail

There is no direct way to import OST data files to Gmail so, it is important to first export the complete OST data to PST file format and then, import PST files in Gmail. Before starting to export OST file to Gmail, it is recommended to back up the complete OST file data.

Export OST to Outlook PST

Method 1: Archive OST file in PST

This method is useful in case you want to move everything like mails, calendars, etc.& migrate OST to Gmail via Outlook PST file format. Auto-Archive method gives you an option for selecting desired number of days after which you need to archive your data. To archive OST Files follow the mentioned steps:

  •     Open MS Outlook in your machine.
  •     Now, click on Tools >> choose options.
  •     From the dialog box, choose Auto-Archive option >> OK.
  •    From the Run Auto-Archive after each option choose the number of days.
  •  Choose location for storing the Auto-Archive file >> click OK.

NOTE: The feature of archive does not archive OST file contacts.

Method 2: Export OST Mail data

Outlook has built in feature of “Export.” It is a quick as well as an easy way to move all the contents from Exchange OST & migrate OST to Gmail via PST. It can also be just used to move contacts and calendars in CSV and Excel file format. However, this method is frequently not employed, as it does not have any guarantee safe migration of data if you are not good technically.

Method 3: Move the items to a new Outlook PST

You can also move the mailbox items from Exchange OST to Outlook PST file. For this, firstly you need to make a new PST file in Outlook. After that, drag all folders from OST file that you need to move one by one in the newly created PST file.
NOTE: It should be kept in mind that by using this method to export OST file to Gmail you will not be able to transfer the default folders of Exchange OST file such as Inbox, contacts, calendars, etc.

Method 4: Trouble- Free Solution

The above-suggested methods can be performed manually. However, these methods do not assure data preservation while exporting from OST to Personal Storage Table. This is because with the help of these methods it is not possible to move all the default folders of the OST Files. Therefore, there are software like OST to PST Converter that makes easy for users to perform "migration of Outlook OST to PST ". The application is designed in such a manner that it does not require Outlook and Exchange connectivity to perform the data conversion. Moreover, it retains the data integrity in exact form after you export OST file to Gmail via PST.

Once the files are converted to PST file format now, it is easy to import the converted data to Gmail by using GAMMO tool.

Import PST to Gmail

There is no any way to import the data to Gmail directly except by using GAMMO tool. It is designed to import the Outlook data to Gmail. GAMMO stands for Google App Migration for Microsoft Outlook. By following the mentioned steps, one can easily import OST to Gmail or Google Apps via PST.

  •  Download and install GAMMO application in your system from official website of Google.
  •  Now, open it and login to Google App migration with the valid credentials to begin export OST file to Gmail.
  •  Select PST file to be imported and choose migrate all data option to import ost to gmail.
  • Choose the desired data items which you need to import ost to Gmail.
  • Select the migrate option to start the procedure to export OST file to Gmail via PST.
  • Once the process is completed, you can easily utilize all your Outlook data by the process to migrate ost to Gmail without compromising the data quality.


Gmail is the most widely used Google application in the present arena. Most of the time, there are different need that arises in front of them because of which users need to migrate their offline OST data in Gmail. In the above-discussion, we have discussed a way to import ost to Gmail in proper manner.