Sorry to contradict you but I did a test on Unity 4.0(5) with DC/GC/Exchange offbox. I shut down the DC/GC/Exchange server and was able to leave VM under umr mode, and use the Opening Greeting callhandler.
These were the events in app logs:
Event Type: Warning
Event Source: CiscoUnity_UMR
Event Category: UMR Thread Error
Event ID: 112
Date: 3/19/2006
Time: 8:35:31 PM
User: N/A
Computer: UNITY
Description:
The Unity Message Repository still cannot communicate with the Partner
Mail Server to deliver messages. Messages will continue to be held in
the temporary store until the mail server is available. 240
Event Type: Warning
Event Source: CiscoUnity_DSAD
Event Category: Warning
Event ID: 1017
Date: 3/19/2006
Time: 8:43:20 PM
User: N/A
Computer: UNITY
Description:
The Cisco Unity service that monitors Active Directory (AvDSAD) is
skipping a synchronization cycle because it failed to connect to
domain controller RAJAH.FLYBALL.COM. Ensure that the server is
accessible and is configured as a domain controller, and that no DNS
issues exist. The service has failed to connect to this domain
controller for 1 consecutive synchronization cycle(s). After 15
consecutive failed connection(s), The Cisco Unity service that
monitors Active Directory (AvDSAD) will attempt to connect to a
different domain controller.
Diagnostic Info:
Domain Controller: RAJAH.FLYBALL.COM
Binding String: LDAP://RAJAH.FLYBALL.COM:389/ROOTDSE
Error Code: ERROR_DS_SERVER_DOWN
Description: The server is not operational.
Event Type: Warning
Event Source: CiscoUnity_DSGC
Event Category: Warning
Event ID: 1040
Date: 3/19/2006
Time: 8:43:52 PM
User: N/A
Computer: UNITY
Description:
The Cisco Unity service that monitors the global catalog
(AvDSGlobalCatalog) is skipping a synchronization cycle because it
failed to connect to global catalog server RAJAH.FLYBALL.COM. The
service has failed to connect to this server for 2 consecutive
synchronization cycle(s). The AvDSGlobalCatalog service will attempt
to connect to a different global catalog server.
Diagnostic Info:
Global Catalog Server: RAJAH.FLYBALL.COM
Binding String:
Error Code: ERROR_DS_SERVER_DOWN
Description: The server is not operational.
Event Type: Warning
Event Source: CiscoUnity_DSGC
Event Category: Warning
Event ID: 1042
Date: 3/19/2006
Time: 8:44:43 PM
User: N/A
Computer: UNITY
Description:
The Cisco Unity service that monitors the global catalog
(AvDSGlobalCatalog) failed to find a new global catalog server, so it
will continue to try to connect to RAJAH.FLYBALL.COM.
Event Type: Warning
Event Source: CiscoUnity_DSGC
Event Category: Warning
Event ID: 1021
User: N/A
Computer: UNITY
Description:
The Cisco Unity service that monitors the global catalog
(AvDSGlobalCatalog) is skipping a synchronization cycle because it
failed to connect to global catalog server RAJAH.FLYBALL.COM. Ensure
that the server is accessible, is configured as a global catalog
server, and that no DNS issues exist. The service has failed to
connect to this server for 1 consecutive synchronization cycle(s).
After 2 consecutive failed connection(s), the AvDSGlobalCatalog
service will attempt to connect to a different global catalog server.
Diagnostic Info:
Global Catalog Server: RAJAH.FLYBALL.COM
Binding String:
Error Code: ERROR_DS_SERVER_DOWN
Description: The server is not operational.
SAWEB error
===============
Error from authentication subsystem.
hr=0x8004054B (The specified domain either does not exist or could not
be contacted.\x0D\x0A)
There may be additional information in the Application log (use the
system Event Viewer).
