![]() Hello of all I would strongly suggest that please do not turnoff your last exchange server until there is a proper way to do so. ![]() What is happening that we could not get mails from Exchange Online Tenants anymore? Is this due to the hybrid setup and would it automatically resolve when we dissolve the setup? Or does it have something to do with the contruction of the external MX? 9:20:16 AM - Server at (mySophosIP) returned '450 4.4.316 Connection refused (Socket error code 10061)'Īll other mail continued to go through without a problem.Īfter we restarted the local Exchange, all mails went through again without a problem. 9:24:58 AM - Server at returned '550 5.4.316 Message expired, connection refused(Socket error code 10061)' The senders received the following error message: This has led to the fact that we have received no more mails from other Exchange Online tenants. ![]() For this purpose we have switched off the OnPrem Exchange for a short time. We would like to switch off the HybridSetup soon. The mails go via MX to a local mail gateway, which checks the mails for spam and then forwards them to Exchange Online. We have a problem with the following configuration: we have a hybrid setup and all mailboxes are already on Exchange Online. ![]()
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