1. As part of this this upgrade UCCX 7.x to 8.5, the maximum historical data that you can bring it to the new version is either 10GB or 51 weeks of old data. The PUT tool will not allow you to take backup exceeding 10GB of historical data, it will prompt a message saying that you need to purger the oldest data before proceeding with a successful backup.
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.