Cisco Unity Deployment and Solutions Guide

MAPI 181

AvMsgStoreMonitorSvr (the service that houses ExchangeMonitor). Exchange logs this

whenever another account logs into a mailbox that is not its own, even if it has rights to do

so; thus, this is not a message to be concerned about:

Windows 2000 User LINDBORGLABS\Administrator logged on to

[e-mail] mailbox, and is not the primary Windows 2000

account on this mailbox.

Another (and perhaps unknown) job of ExchangeMonitor is to detect when an Exchange

mailbox of a Unity subscriber has been moved. It is not uncommon for a network adminis-

trator to move the mailbox of a give Unity subscriber from one location to another. When

this happens, Directory Monitor detects the change on that subscriber object and writes the

change into SQL. Writing the change into SQL sets off a special trigger, and information

about the subscriber is written into a special Moved Mailbox table. At the same time, the

trigger sets off an event that a thread in ExchangeMonitor has been waiting on. When

this event is fired, ExchangeMonitor reads the Moved Mailbox table to gather the relevant

information on the recently moved subscriber’s mailbox. ExchangeMonitor then logs out

the old mailbox of that subscriber and logs into the new mailbox while reregistering for

change notifications of that new inbox.

DominoMonitor

In the case of Domino, the Message Store Monitor actually registers for changes on

any inboxes that it is interested in through the Domino Unified Communications Service

(DUCS) interface on each Domino server that houses one or more Unity subscribers. When

changes have happened on Unity subscriber inboxes, a message count packet is sent to the

Unity server. This contains data wrapped in XML, signifying the user and the type of change

that occurred. When any message is added, removed, or modified, the Message Store

Monitor is notified of this change and pushes the appropriate event onto the notification

queue in the same way the Exchange Message Store Monitor does. At startup, Unity logs

into each user’s mailbox and synchs. After that, it is simply a matter of adjusting as

necessary based on change events for each user’s mailbox.

MAPI

Unity uses MAPI to send messages and interact with subscribers homed on MS Exchange.

In a lot of ways, Unity behaves as a normal MS Outlook client. In most ways, however,

Unity’s use of MAPI is truly server-based and more optimized than the normal Outlook

client. The optimizations are made to the normal MAPI profile that Unity creates and uses

during installation. These optimizations are done so that Unity can log onto many mail-

boxes at once and register to receive notifications of changes on many inboxes (Exchange-

Monitor uses the same MAPI profile as the MAL).

Microsoft Outlook is no longer supported on the Cisco Unity server as of version 3.x.

Instead, the Exchange 5.5 Administrator program is required on the Unity server for