Synchronizing and viewing subfolders, custom folders.Mails can be read without downloading it.Using MAPI data can be stored and accessed easily. While using IMAP & POP these features are not available but it is possible in case of MAPI. It is a full groupware protocol that helps people work collectively while located in remote areas, at the same time increasing collaboration and productivity. Short for Messaging Application Programming Interface, MAPI uses point to point communication between software application. GSSMO provides synchronization with Gmail, Calendar events, Tasks, Contacts, Notes & Journal entries. In order to do this a software tool called GSSMO (G Suite Sync for Microsoft Outlook) is used. Microsoft Outlook and G Suite can be paired together to make sync possible. If an organization has switched to Google Accounts but wants to keep using Microsoft Outlook then GSSMO is used.