We have a few clients that use Sage 50 2015. We are looking to push the 2015.3 update. We +100 machines that we will need to get updated.

I have been looking at how I can get this update silently installed.

I have tried all of the installshield switches and don't seem to be able to get this update to push silently.

The iss file that the update creates from the record option also seems to be bad as I always get errors in my log. 

[InstallShield Silent]
Version=v7.00
File=Log File
[ResponseResult]
ResultCode=-3

What can I do to alleviate the need to touch all these machines?

Any plans to move to an MSI based install?

Silent deployment of software updates like this are critical.