No, no Change log available. At this time, writing this blog post, there is no change log available from Microsoft. So my different clients with different OSs received the Next Generation Sync Client with the Version 17.3.6799.0327.
[04/13/17 Update] Microsoft has done an Update on the change log site. The Released Version now is 17.3.6799.0327
But there is a newer version available
|Windows 7, 8.1, 10||17.3.6799.0327|
|Windows 10 Creators Update||17.3.6816.0313 *)|
here you will find a complete overview about all versions
*) If you have Windows 10 and update to The Creators Edition (Version 1703 Build 15063.x, the Next Generation Sync client will be updated to version 17.3.6816.0313
some words to the automatic Update of the Next Generation Sync Client
also on with this blog post. people around the globe ask me about the automatic self-Update of the NGSC. Yes, you may update the NGSC to a higher version manually. But you do not do that. Your device is going, to do that fully automatic. The NGSC will be started each time, you log on your system. And after starting, the NGSC is looking, if Microsoft has released a new Version in your ring for your tenant. And the device download this new version, it’s about 20 MB, to your device. Without You neither your administrator. You do not need Windows Update, no WSUS (Windows Software Update Service) and also Microsoft Intune is not required.
Background about this behavior is, that f.e. Microsoft has made some changes of their servers in Office 365 and it is possible, to have an updated version of the NGSC on all clients of the world. But not for all clients at one time. So there are regulations insider Microsoft and due to the rings system your tenant will not receive the information today, but fortunately tomorrow. So due to this the Users will have the newest NGSC on their devices and do not receive error messages and have to ask their administrators. This also work if you have a new windows 10 device and start it for the first time without any Synchronization or without any Microsoft Account.
So Microsoft has to make a complete quality check for each new version of the NGSC.