I am encountering the same issue. All of the subscribers have been imported with the correct call transfer setting in the template. If I check the "No" option, save, recheck the "Yes, ring subscribers extension" and then save again the call transfer works.
I also do not want to go in and touch hundreds of accounts if there is a quicker way of doing this.
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.