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• If the maximum number of sessions was reached and you configured a timeout limit, the BlackBerry Collaboration
Service logs out any instant messaging sessions on devices that are outside of a wireless coverage area, and any
instant messaging sessions that are no longer sending status messages to the BlackBerry Collaboration Service.
• If no idle sessions exist, the BlackBerry Collaboration Service sends a Server Busy status message to the device and
rejects the login request.
• If you did not configure a maximum number of sessions and the number of sessions equals the total number that
the HTTP persistent connection supports, the BlackBerry Collaboration Service sends a Failed status message to
the device and rejects the login request.
The BlackBerry Collaboration Service checks the BlackBerry Configuration Database to verify that the user has
permission to use the collaboration client, and tries to authenticate the user using Integrated
Windows authentication.
The
BlackBerry Collaboration Service sends a login request in SIP format to the Microsoft Communication server and,
for Microsoft Office Communications Server 2007 R2, sends a login request to Microsoft Active Directory directly.
The BlackBerry Collaboration Service opens the connection using TLS over port 5061.You can also configure the
connection to use TCP for Microsoft Office Communications Server 2007 R2.
5. The BlackBerry Collaboration Service formats the request using a Microsoft API and sends the request to the Microsoft
Communication server over an MTLS connection.
6. The Microsoft Communications Server accepts the request, processes the login information, and sends the acceptance
to the
BlackBerry Collaboration Service.
7. The BlackBerry Collaboration Service sends the message that contains the acceptance through the BlackBerry
Dispatcher to the device in encrypted and compressed format, and creates a cache of the connectivity information to
maintain the instant messaging session.
Process flow: Starting an instant messaging session
using the BlackBerry Client for IBM Sametime
Feature and Technical Overview BlackBerry Enterprise Server process flows
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