Frequent Account lockouts

We are having passthrough authentication setup and we see lot of errors recently with the below process

Process Information:
Caller Process ID: 0x8e4
Caller Process Name: C:\Program Files\Microsoft Azure AD Connect Authentication
Agent\AzureADConnectAuthenticationAgentService.exe

Users are getting locked out too frequently. The auditing software points to the server where AD connect is installed. I am not sure why this is happening but need your advice and suggestions please. Thank you all.