Error Message
EV Shell command 'Sync-EVSMTPServerSettings' fails with:
Sync-EVSMTPserverSettings : Could not syncronize the configuration settings for Enterprise Vault SMTP Archiving.
Exception: An error relating to security occurred. (Exception from HRESULT: 0x8013150A)

The dtrace of the AdminService during the failed sync contains:
[4980] (AdminService) <12560> EV-H {MSwitchServer.InvokeHelper}Exception: The username or password is incorrect.| Info:Error occured while calling method: Void b__0(). Failed to set TLS. Diag: Type:System.Security.SecurityException ST: at System.Security.Principal.WindowsIdentity.KerbS4ULogon(String upn, SafeAccessTokenHandle& safeTokenHandle)| at System.Security.Principal.WindowsIdentity..ctor(String sUserPrincipalName, String type)| at System.Security.Principal.WindowsIdentity..ctor(String sUserPrincipalName)| at Symantec.EnterpriseVault.SmtpCommon.SmtpHelper.GetVSAUserName()| at Symantec.EnterpriseVault.Smtp.Config.MtaConfiguration.SetPermissionsOnFile(String fileName)| at Symantec.EnterpriseVault.Smtp.Config.MtaConfiguration.SetServerPassword()| at Symantec.EnterpriseVault.Smtp.Config.TlsConfiguration.Configure()| at Symantec.EnterpriseVault.Smtp.Config.MSwitchServer.<>c__DisplayClass44_0.b__0()| at Symantec.EnterpriseVault.Smtp.Config.MSwitchServer.InvokeHelper(Action act, String errorMessage) Inner:None
[4980] (AdminService) <12560> EV-H {MSwitchServer.InvokeHelper} Exception: The username or password is incorrect.| Info:Error occured while calling method: Void b__61_0(). Failed to Synchronize SMTP Settings in configuration file from directory database. Diag: Type:System.Security.SecurityException ST: at System.Security.Principal.WindowsIdentity.KerbS4ULogon(String upn, SafeAccessTokenHandle& safeTokenHandle)| at System.Security.Principal.WindowsIdentity..ctor(String sUserPrincipalName, String type)| at System.Security.Principal.WindowsIdentity..ctor(String sUserPrincipalName)| at Symantec.EnterpriseVault.SmtpCommon.SmtpHelper.GetVSAUserName()| at Symantec.EnterpriseVault.Smtp.Config.MtaConfiguration.SetPermissionsOnFile(String fileName)| at Symantec.EnterpriseVault.Smtp.Config.MtaConfiguration.SetServerPassword()| at Symantec.EnterpriseVault.Smtp.Config.TlsConfiguration.Configure()| at Symantec.EnterpriseVault.Smtp.Config.MSwitchServer.<>c__DisplayClass44_0.b__0()| at Symantec.EnterpriseVault.Smtp.Config.MSwitchServer.InvokeHelper(Action act, String errorMessage)| at Symantec.EnterpriseVault.Smtp.Config.MSwitchServer.SetTls(EV_SMTP_TLS tlsType, Object certificate, String encryptedPassphrase)| at Symantec.EnterpriseVault.Smtp.Config.MSwitchServer.b__61_0()| at Symantec.EnterpriseVault.Smtp.Config.MSwitchServer.InvokeHelper(Action act, String errorMessage) Inner:None
[4980] (AdminService) <12560> EV:H {CSmtpConfigHelper::SyncSettingsFromDB:#47} Failed to sync MtaTailor setting with DB. Error: <0x8013150a>