This problem can occur if you have configured the device
name for Cisco IP Communicator to be the same as the Cisco Unified
Communications manager username. This is not a supported configuration, and you
should change the device name for Cisco IP Communicator to a unique name.
Remote Call Control is Not Working Following OCS Restart
If Remote Call Control is not working for the
Microsoft Office Communicator users,
and the SIP Proxy service is not processing incoming messages from the
Microsoft Office Communicator Server, check the following:
This can be caused by a high number of simultaneous sign in
Microsoft Office Communicator after
Microsoft OCS. When many of these attempts are made
concurrently, the SIP Proxy service is flooded with INVITES and INFO messages.
Notify users about the service outage and recommend that they sign
Microsoft Office Communicator
during this time.
Stop the SIP Proxy service.
Restart the Microsoft OCS.
Restart the SIP Proxy service.
Notify users that they must sign in again to ensure that Remote
Call Control is working properly.
Microsoft Office Communicator Client Cannot Connect to the IM and Presence Service Tab
Microsoft Office Communicator client
cannot connect to the
IM and Presence Service tab, check the following:
You may have specified an invalid IP address or FQDN for your
IM and Presence Service node. Repeat the plug-in installation procedure,
specifying the correct
IM and Presence Service node address in the command in Step 1.
If you experience tab connection problems, note the following:
You may need to add the web address of the
IM and Presence Service node to the list of trusted web addresses in the browser
on the client PC. In Microsoft Internet Explorer,
select , and add the web address
https://<IM and Presence Service_node_name> to the list of trusted web addresses.
You may need to add the HTTPS web address of your domain to
the security zone of the
IM and Presence Service node. In Microsoft Internet Explorer, select
and add the entry
https://*.your-domain to the list of web
addresses for the security zone.
If an error message displays informing users that they do not have
permission to use this feature, you need to enable users for
Microsoft Office Communicator on
IM and Presence Service.
Problems Installing the Plug-in on Microsoft Vista
If you are running a Microsoft Vista platform and you
experience problems installing the plug-in, you may need to turn off User
Access Control (UAC) on the client PC. Follow this procedure to turn off UAC:
Sign in to the client PC with the credentials of a member of the
local Administrators group.
User Accounts in the User Accounts pane.
Turn User Account Control On or Off in the
User Accounts task pane.
If UAC is currently configured in Admin Approval Mode, the User
Account Control message displays. Select
Use User Account Control (UAC) to help protect your
Select Restart Now to apply the change.
Figure 1. Microsoft Office Communicator client with Phone Selection tab