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Posted by: Lemonde - 25 July 2017 11:19:50
Log Name: Application Source: MSExchange ActiveSync Date: 25/07/2017 01:05:38 Event ID: 1040 Task Category: Requests Level: Warning Keywords: Classic User: N/A Computer: servername.domain.suffix Description: The average of the most recent [535] heartbeat intervals used by clients is less than or equal to [540]. Make sure that your firewall configuration is set to work correctly with Exchange ActiveSync and Direct Push technology. Specifically, make sure that your firewall is configured so that requests to Exchange ActiveSync do not expire before they have the opportunity to be processed. For more information about how to configure firewall settings when you use Exchange ActiveSync, see Microsoft Knowledge Base article 905013, "Enterprise Firewall Configuration for Exchange ActiveSync Direct Push Technology" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=905013). Event Xml: 1040 3 1 0x80000000000000 422156 Application servername.domain.suffix 535 540

Posted by: Lemonde - 25 July 2017 11:30:52
The router we are using is a DrayTek Vigor 2830 and we have changed the timeout for port numbers to: 600 seconds by: portmaptime -s 600 This was in response to a suggestion from sircles.net