Exchange Server 2010 Services

	Service Name	Server Role	Description
1	IIS Admin	CAS	Used for managing IIS metabase which stores configuration information for the SMTP and FTP.
2	Microsoft Exchange Active Directory Topology	HT Mailbox CAS UM	Responsible for providing Active Directory Topology information to the Exchange.
3	Microsoft Exchange Address Book	ET	Maintains Client Address Book connection with for Exchange Server.
4	Microsoft Exchange Anti-Spam Update	Â	Used in Forefront Security on an Exchange Server for maintaining anti-spam data.
5	Microsoft Exchange EdgeSync	HT ET	Responsible for providing EdgeSync services between HT and ET servers.
6	Microsoft Exchange File Distribution	Â	It distributes Exchange data to other Exchange servers.
7	Microsoft Exchange IMAP4	CAS	It provides IMAP4 services to clients
8	Microsoft Exchange Information Store	Mailbox	Most important service. It manages Mailbox and Public folder stores
9	Microsoft Exchange Mail Submission	Mailbox	Submit messages from the Mailbox server to the Hub Transport servers
10	Microsoft Exchange Mailbox Assistants	Mailbox	It manages assistant for Calendar updates and booking resources.
11	Microsoft Exchange Monitoring	Â	Used for Monitoring and diagnostic Exchange.
12	Microsoft Exchange POP3	CAS	Provides POP3 services to the clients.
13	Microsoft Exchange Protected Service Host	Â	Provides secure host for Exchange services.
14	Microsoft Exchange Replication Service	Mailbox	Used in Continuous replication.
15	Microsoft Exchange RPC Client Access	CAS	Used in RPC connections with Exchange Server.
16	Microsoft Exchange Search Indexer	Mailbox	Improve Search performance by indexing on mailboxes.
17	Microsoft Exchange Service Host	Â	Provides Essential Exchange Services.
18	Microsoft Exchange Speech Engine	UM	Provides Speech Recognition services.
19	Microsoft Exchange System Attendant	Mailbox CAS	Used in monitoring, Maintenance and Active Directory lookup services.
20	Microsoft Exchange Throttling	CAS	Limit the rate of user operations.
21	Microsoft Exchange Transport	HT ET	Used in Mail transportation.
22	Microsoft Exchange Transport Log Search	HT ET	Provides Search capabilities for transport log files.
23	Microsoft Exchange Unified Messaging	UM	Provides Voice mail and Fax messages access.
24	World Wide Web Publishing Services	CAS	Provides IIS administration features

ET- Edge Transport

CAS- Client Access Services

HT- Hub Transport

UM- Unified Messaging