If so, this is rather an RDP/VMWare problem. Remote Utilities' RDP mode just launches the native Microsoft RDP client for you. If Internet-ID connection is used, then RU simply acts as a tunnel - it doesn't get in the way of how RDP works.
Here is some info from the Internet on the subject:
As of now it looks like Viewer becomes disconnected after being inactive for a certain time.
This is not a program's feature. It looks like a connectivity problem. It would help looking at the Host log - feel free to create a support ticket and submit your Host log/logs for examination. The Host logs are located in C:\Program Files(x86)\Remote Utilities - Host\Logs\
We understand everyone's frustration when it comes to features long awaited. However, please keep the conversation civil. We gladly accept any criticism and suggestions, but we will not tolerate posts that are calling other customers to abandon the product just because it doesn't have a specific feature that you need and they might not. We have our Forum Rules, feel free to familiarize yourselves with them.
Marc, I very rarely use my moderator's powers to delete forum posts lest anyone say that we suppress democracy here. Unfortunately, I have to do so about your posts in this thread because they are not only ranting about the feature being delayed, but they are also defaming our company and product as a whole and calling others to stop using the product just because it doesn't have Mac support. Sorry for that.
I'm sorry the lack of Mac support is not available yet. Currently we are preparing the 6.9 version for open beta - among other improvements, namely with speed and performance, this version will also get two-factor authentication.
Mac support is the next priority after we release version 6.9. As for ETA, I'm not sure I can give any estimates - far too often they were incorrect in the past due to various reasons.
Please, make sure that you updated Remote Utilities (both Viewer and Host) to the most recent version which is 126.96.36.199 as of this writing. Then, just in case, re-issue the Internet-ID - on the host side right-click on the Host icon, select "Internet-ID connection settings", click Advanced and select Get new ID. When the ID is generated update the corresponding connection record in the Viewer address book.