I have almost the same problem, Sage working well both Web and Desktop version in the localhost environment bur throws the attached error when accessed externally. Any heads-up on this?.. Am accessing it using a secure A record/ Subdomain

Hi Dickson Andati to confirm, in your URL address bar at the top there are no errors and the SSL certificate name matches the server address?  Are you publishing through a reverse proxy or anything similar that's performing URL translation that may be causing a resolution or DNS issue?  I figure your firewall is open for port 443 (if that's what you're using) as you're reaching the login screen.

If you've already done the obvious things like restarting IIS and the Sage.CNA.WindowService, then I would check the Logs and Event Viewer.  For example the logs are located under \Online\Web\Logs and \Online\Worker\Logs e.g. C:\Sage300Apps\Online\Web\Logs and C:\Sage300Apps\Online\Worker\Logs.

Under the event viewer, again check for Errors, particularly any references to IIS / Internet Information Services.

Good luck & keep us posted!

Hi Tim - Accsys Consulting ,Cant trace anything on the log files and also windows event viewer related to the error I am getting

Can you please let me know the URL or at least provide a screenshot of the problem?  Feel free to DM me if required.  You can check out my demo site at https://sage300demo.accsysconsulting.com.au:4433/Sage300/ if you want an example.  I can help you check your A records and certificate are correct.  Its strange none of the logs are showing anything because when an error is returned a log entry should be written. Literally the #1 cause of this problem is that the URL you're using to access the site does not match the friendly/common name of your SSL certificate.  Can you provide screenshots of the URL and the Certificate Details?  Also, can you access the IIS Welcome page without a browser or certificate error and provide a screenshot of that? Have you put a ticket in to Sage 300 support?  Make sure you do that, and also contact your Sage 300 consultant or Business Partner.  I'm doing my best but really need more information to be able to assist

Can you please let me know the URL or at least provide a screenshot of the problem?  Feel free to DM me if required.  You can check out my demo site at https://sage300demo.accsysconsulting.com.au:4433/Sage300/ if you want an example.  I can help you check your A records and certificate are correct.  Its strange none of the logs are showing anything because when an error is returned a log entry should be written. Literally the #1 cause of this problem is that the URL you're using to access the site does not match the friendly/common name of your SSL certificate.  Can you provide screenshots of the URL and the Certificate Details?  Also, can you access the IIS Welcome page without a browser or certificate error and provide a screenshot of that? Have you put a ticket in to Sage 300 support?  Make sure you do that, and also contact your Sage 300 consultant or Business Partner.  I'm doing my best but really need more information to be able to assist

There is also a Support Genie Tool available here https://ca-kb.sage.com/portal/app/portlets/results/viewsolution.jsp?solutionid=220924560107242&page=1&position=0&q=support%20genie that can be used to collect all the relevant logs (not just Web Screens, but IIS Logs, Event Logs, etc.).. 

Regards,

DCrampton

Wow DCrampton thanks for this, I didn't know about the Support Genie Tool!  Dickson Andati  are you able to run the Support Genie to see if you can get some relevant logs?

Thanks guys, It worked well, It was an internal DNS issue causing the connection failure

To help others reading this Dickson Andati ended up adding an internal HOSTS entry so the server could refer to itself by the external name temporarily until a proper internal DNS forwarder could be added to the Domain Controller's DNS service.