On the MSP backup website for the jobs we have. We have a password set at the moment under the "Compression and Encryption Options". If we are to change the password in the future, what would happen. I'm guessing that it would only new files that are transferred be encrypted with this new password? If so then how can I push all the files again so that the new password is used for all files?
Yes, you're correct, the pass will only apply to the new versions of the files in this case. You can try changing it from the software GUI, in that case the application will offer to re-upload everything with the new password.