How to address this problem "The request failed.Unrecognized SSL message, plaintext connection?" ?

[ghost]

Hi, team, hope you can help me out. Thanks!
The full stack is

microsoft.exchange.webservices.data.core.exception.service.remote.ServiceRequestException: The request failed. The request failed. Unrecognized SSL message, plaintext connection?
at microsoft.exchange.webservices.data.core.request.SimpleServiceRequestBase.internalExecute(SimpleServiceRequestBase.java:74)
at microsoft.exchange.webservices.data.core.request.MultiResponseServiceRequest.execute(MultiResponseServiceRequest.java:158)
at microsoft.exchange.webservices.data.core.ExchangeService.bindToFolder(ExchangeService.java:504)
at microsoft.exchange.webservices.data.core.ExchangeService.bindToFolder(ExchangeService.java:523)
at microsoft.exchange.webservices.data.core.service.folder.Folder.bind(Folder.java:98)
at microsoft.exchange.webservices.data.core.service.folder.Folder.bind(Folder.java:147)
at com.fit.wallink.wcs.business.utils.mail.service.impl.FitBootExchangeServiceImpl.listMailsBySearchFilter(FitBootExchangeServiceImpl.java:89)
at com.fit.wallink.wcs.business.reconciliation.apigate.download.ApigateReconDownHandler.acquireReconEmail(ApigateReconDownHandler.java:185)
at com.fit.wallink.wcs.business.reconciliation.apigate.download.ApigateReconDownHandler.downloadBillFromEmail(ApigateReconDownHandler.java:121)