Mojave (macOS 10.14.0 & above) introduced a new security feature that's enabled by default and cannot be bypassed without User Approved MDM and PPPC (TCC) Whitelisting Profiles for each application that interacts with the system. This feature has restricted the use of mouse and keyboard controls if the following steps are not completed.
Below are a few articles we recommend reviewing and configuring in your system to help manage devices with User Approved MDM:
If you navigate to Policies > Integrations > MDM Integration and setup the MDM Integration and Deploy Now, it will push down an MDM Profile that requires user approval. Only the User can approve it via System Preferences > Profiles - They will see an Approve button on the Profile such as below:
Note: Only a local user can approve it
If agent download was via MDM Profile then they will receive a prompt similar to below:
Once that is configured our ScreenConnect and Addigy Remote Control PPPC (TCC) Payloads will push out and you can connect to the device without user approval.
However, if MDM is not implemented the user will need to navigate to System Preferences > Security & Privacy > Privacy > Enable Screen Connect in Accessibility by checking off the box and any other required areas, before full desktop control is granted.
Below you can see our default PPPC Profiles along with the MDM Profile: