Hi,
Echange2013-Office365 hybrid mode.
My problem is that when someone from outside the organization sends an email to @company.com (defaut domain) on-prem exchange and O365 exchange won't receive it. But if it is sent to @company.onmicrosoft.com, then o365 exchange receives it.
The server which hosts exchange is a DNS server as well, but nothing was changed in the DNS entries.
Windows server 2012 r2.
Before this error occoured, I was installing a VPN role on the server. But after the first signs of errors, I removed that role.
Could it be something with the NICs? I think VPN wizzard configured the Nics and I also added in the vpn wizzard somewhere DNS servers. Later I checked the NIC and removed secondary DNS - Primary DNS is the server itself. (1.0.0.27) - But it still doesn't work. Again, the VPN role was removed so it should not interfere with the NICs anymore.
We are in trouble and help would be greatly appriciated.
Thank you all,