Change Auditor Agent service fails to start and the following is recorded in the Change Auditor Agent log file:
Investigate the C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Config\Machine.config for possible invalid modifications.
If ChangeAuditor coordinator is 7.0.3, please make sure .Net framework version is 4.7 or later. If not, upgrade .Net framework to 4.7, restart Agent service and check.
Also, make sure Agent version and CA coordinator version is same.