We have recently replaced our router at our main site to the Draytek 2860n, and we seem to have had it working OK. For the first 2 days, all was well, but now I can no longer access the site using OWA.
I can log in using Remote Desktop, and exchange seems to be working for all of the users at the site. However, my iphone can no longer receive e-mail, and when I try to access it using remote.domainnam.co.uk the webpage times out.
I have all of the correct ports forwarded to the exchange server, and as I said it did work for 2 days after raplacement, so the router may not be the problem here, but I thought I should mention it.
Does anyone have any suggestions on how to troubleshoot this problem, as its causing quite a lot of disruption for remote workers.
The other thing is that when I run mxtoolbox it reports that the smtp server is accessible and working fine???