Sorry, we did not go for this in the end so did not get a chance to try and get it to work.
But from what I understand there is a specific service to be configured in lync to allow this and with the office 365 offering you have no controll over this service as a customer. Sop I would guess it will not work.
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.