SAP MAPI Service Provider (BC-SRV-GBT) 
Purpose
The SAP MAPI Service Provider (SAP MAPI, also: SAP MAPI SPI for Service Provider Interface) allows access to the R/3 mail server
Business Workplace (previous name: SAPoffice) and to the
SAP Business Workflow from the MAPI-compatible mail clients. Users can therefore use the SAP MAPI working environment in order to edit and send Workplace documents and to execute work items. Examples of MAPI-compatible mail clients: Microsoft Windows MessagingTM, Exchange Client for Windows
TM and Microsoft Outlook for Windows
TM.
Integration
The SAP MAPI service also consists of three services which link the Workplace and the SAP Business Workflow via RFC. The link is triggered when the user calls the mail client in online mode. Synchronization takes place in both directions, that is, changes made in the mail client can be seen in Workplace and vice versa.
Features
SAP MAPI offers:
for example, manage, send or receive documents
You can access SAP Business Workflow immediately, processing work items directly in the MAPI clients. In addition, work items can also be processed via
SAPforms .
You can also edit messages or work items without a link to R/3. For example, messages can be registered, changed and "sent", that is, put in the out box. When you log on to the R/3 System again, these messages are automatically sent in R/3. You can, for example, "forward" work items offline, that is they are only actually flagged for transfer. They are then automatically forwarded in R/3 upon the next logon.
In general, all offline changes are automatically updated when they "are online" again. For work items you can use a special Outlook form.
See also:
Configuring SAP MAPI Working in the mail client.