Here's a follow up on this issue, in case some one else runs into it. and now for the keyword search SDATA, SDATA Connection Error, For God's Sake Please Make it Stop,
This install has a Domain Controller Server and an application server for Sage 100, we could get the internal communication to work from the application server using
https://mymachinename/sdata/MasApp/MasContract/TST/AR_Customer. An external url communication would not connect and would give ""Server Error"" File or directory not found. I found out that SDATA requires port 443 for connecting from the outside, and in this case port 443 (default port for https) was being used for their exchange server. So the fix was to get the end user to get another IP address from their ISP and change the WAN IP on firewall, reconfigure DNS records, change the sdata A record and change the firewall IP. My take-away, this will probably be the last time I use anything connected with SDATA, it was a colossal PITA . Got the Vibe from Sage that SDATA for Sage100 is a sun-setted product (will be maintained but not updated as time goes on) and would encourage folks to use other options like Web Services parts and BOI.