Create a new Role Group. The name is unimportant, but should help you identify it.
Add to the group, the user you've designated for the Exchange Connector.
You will need a version of .Net for the application to run. You can install .Net 4.5.2 to satisfy the requirement.
|The BLOC Server provides Active Direcory and UCMA connections (Advanced Mode), and a MS SQL Database. Here are the suggested build outs. The roles change based on whether or not you deploy a Basic server or and Advanced Server. The server OS is dictated by the Skype for Business version. Example, if you wish to run Windows 2016, you must be running Skype for Business with the CU5 applied.|
Suggested Minimum Server Specifications