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No missed call notification or Voice mail on the OCS
Phone device (09/29/2008) |
Problem:
We have seen so
many times that the customer would not get missed call
notification or voice email on the OCS Phone device.
Though Microsoft office communicator will keep receiving
missed call notification. So the missed call
notification and voice emails are shown in MOC 2007 but
not on OCS Phone devices.
Reason:
There is a
fundamental difference between how a MOC receives missed
call notification and how an OCS Phone device receives
it.
The OCS Phone
device uses Exchange 2007 web services to get the missed
call notifications and voice mails.
Resolution:
You need to ensure
that the autodiscover feature of Exchange 2007 is
working fine.
Ensure that you do
have an A record “autodiscover.<SMTP DOMAIN>” pointing
towards the exchange 2007 autodiscover service (Exchange
2007 CAS server).
Ensure that the CAS
server is configured with a certificate having FQDN
autodiscover.<SMTP DOMAIN> in subject name or Subject
Alternate Name (SAN).
Ensure that the OCS
Phone device does have root CA certificate of the
certification authority which has issued certificate to
the Exchange CAS server.