We are checking this "certificate issue". If we find any solution/workaround that could be done I'll post it ASAP in this thread. P.S. Unfortunately, there is no way to get logs from account plugin (if you don't have an access to /var/log/syslog).
Oct 19 18:32:50 (none) mfeplugin[2259]: [Debug] Accounts::Service* MfeAccountSetupContext::getMfeService(const QString&, const QString&) "mfemail" Oct 19 18:33:07 (none) mfeplugin[2259]: [Debug] virtual void MfeCheckCredentialsDialog::createContent() Oct 19 18:33:08 (none) mfeplugin[2259]: [Debug] void MfeCheckCredentialsDialog::onAppeared() already online Oct 19 18:33:08 (none) mfeplugin[2259]: [Debug] void MfeCheckCredentialsDialog::sendRequest() Oct 19 18:33:08 (none) mfeplugin[2259]: [Debug] Connecting to URL: "https://webmail.domain.com:443/Microsoft-Server-ActiveSync" Oct 19 18:33:08 (none) mfeplugin[2259]: [Debug] QNetworkReplyImpl::_q_startOperation was called more than once Oct 19 18:33:08 (none) mfeplugin[2259]: [Debug] void MfeCheckCredentialsDialog::onSendFinished(QNetworkReply*) replyError= 204 "Host requires authentication" Oct 19 18:33:08 (none) mfeplugin[2259]: [Debug] error( 0 )= 204 Oct 19 18:33:08 (none) mfeplugin[2259]: [Debug] MfeAuthenticationFaildSheet::MfeAuthenticationFaildSheet(MfeAccountSetupContext&) Oct 19 18:33:10 (none) mfeplugin[2259]: [Debug] void MfeCheckCredentialsDialog::sendRequest() Oct 19 18:33:10 (none) mfeplugin[2259]: [Debug] Connecting to URL: "https://webmail.domain.com:443/Microsoft-Server-ActiveSync" Oct 19 18:33:10 (none) mfeplugin[2259]: [Debug] void MfeCheckCredentialsDialog::onSendFinished(QNetworkReply*) replyError= 204 "Host requires authentication" Oct 19 18:33:10 (none) mfeplugin[2259]: [Debug] error( 0 )= 204 Oct 19 18:33:11 (none) mfeplugin[2259]: [Debug] void MfeCheckCredentialsDialog::sendRequest() Oct 19 18:33:11 (none) mfeplugin[2259]: [Debug] Connecting to URL: "https://webmail.domain.com:443/Microsoft-Server-ActiveSync" Oct 19 18:33:12 (none) mfeplugin[2259]: [Debug] void MfeCheckCredentialsDialog::onSendFinished(QNetworkReply*) replyError= 204 "Host requires authentication" Oct 19 18:33:12 (none) mfeplugin[2259]: [Debug] error( 0 )= 204 Oct 19 18:33:13 (none) mfeplugin[2259]: [Debug] void MfeCheckCredentialsDialog::sendRequest() Oct 19 18:33:13 (none) mfeplugin[2259]: [Debug] Connecting to URL: "https://webmail.domain.com:443/Microsoft-Server-ActiveSync" Oct 19 18:33:13 (none) mfeplugin[2259]: [Debug] void MfeCheckCredentialsDialog::onSendFinished(QNetworkReply*) replyError= 204 "Host requires authentication" Oct 19 18:33:13 (none) mfeplugin[2259]: [Debug] error( 0 )= 204