Yes, sign in to Zynchro, then go to System Config -> Profiles/Users -> Users.
Then select a client that the user has access to and click on the Edit button of said user.
In the Email field, input the new Email address.
* The images used in this guide are for illustrative purposes only and designed to be a representation and/or general orientation of the required steps and/ or existing system and are not in any way designed to represent or guarantee aspects of the project, software and or information from any particular unit or location.