Mid server goes down after every upgrade with error 'No issuer certificate for certificate in certification path found'DescriptionInstance is upgraded from Paris patch 9 to patch 10. Found that the user data is not synced with AD because the mid server is down.It happens after every upgrade, goes up after reimporting the certificates.Release or EnvironmentParisCauseFound below error in Agent log: 2021-10-26 15:27:42 (400) File sync worker: ecc_agent_mib SEVERE *** ERROR *** SOAP Response: Status code=0, Response body=null 2021-10-26 15:27:42 (400) File sync worker: ecc_agent_mib WARNING *** WARNING *** Could not get file sync snapshot because: Request not sent to uri= https://aspeninsurance.service-now.com/MIDFileSyncSnapshot.do?SOAP : javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: java.security.cert.CertPathBuilderException: No issuer certificate for certificate in certification path found. 2021-10-26 15:27:42 (400) File sync worker: ecc_agent_mib Finishing file synchronization: ecc_agent_mib 2021-10-26 15:27:42 (400) File sync worker: ecc_agent_mib Setting countdown to 1800 seconds in com.service_now.mid.filesync.MIBSyncer 2021-10-26 15:27:42 (416) File sync worker: ecc_agent_jar WARNING *** WARNING *** Request not sent to uri= https://aspeninsurance.service-now.com/MIDFileSyncSnapshot.do?SOAP : javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: java.security.cert.CertPathBuilderException: No issuer certificate for certificate in certification path found. ResolutionPlease enable MID server in Debug so that once the instance is upgraded, the MID will also auto upgrade.If in case the MID does not start post upgrade, you can collect logs in Debug.To enable MID server in Debug:1. Login to the instance2. Navigate to MID Server under ecc_agent table.3. Under configuration Parameters Tab, click on New4. Search for mid.log.level in the drop down5. Set value : debug6. Click save or update.7. If possible try to restart MID Server service.Keep a watch on MID server upgrade post instance is upgraded.MID Server is upgraded successfully post upgrade of the instance MID Name: ServiceNow ProdStatus: Up and Validated.Once MID upgraded successfully, please turn OFF the Debug on MID (mid.log.level). Reference to manually restore a Mid server after a failed upgrade Click here