We have a cucm 8.6.2 and have 4-5 phone model connected to our server.
Recently we had some problem with the 6921 phone model, history call unavailable, transfer call doesn't work. The firmware load was 9.3.1 so I've just download the lastest firmware 9.3.3(SR1) and make the upgrade, the history call is available but now the time on the phone is 4 hour later. all other phone got the correct time, only the 6921 who's reboot and upgrade.
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.