The problem was two fold. Most of the systems were Dell OptiPlex's and most had the Yamaha software installed. Also found out that Virus scanners had to be stopped. Sometimes the install would fail, other times Outlook would hang. By removing the Yamaha software and exiting the VS, everything worked fine.
We too have had these problems - Yamaha/Virus scaning removal solved 98% - but we still have 2% of our clients with TfXExt32.dll errors on Outlook which prevent Viewmail from working at all (some with those errors can be ignored and they just don't get ViewMail menu options but they have the form - a small number don't work at all.
Anyone else run into a fix for the TfXExt32.dll issue?
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.