There is a bug on CUCM depending on the verison - at least on our CUCM, on approx 1500- 1600 users- Unity Connection does not import any more- how many users are you trying to import?, try to reduce the number to test
You probably don't have the integration setup proplery. In CUCM, make sure you have Unity Connection defined as an Application Server as an ip address and that you have an Application User with 'Standard AXL API Access' as a role associated to the Application Server. In Unity Connection, make sure that you have the CUCM server defined as an AXL Server in the Phone System and that you have the port set to 8443.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.