This is for the IIS on a W12 R2 server with a skype for business server.
Im a bit lost here, im getting this error, but i doble check on the Router 53 DNS txt records and are ok
The error is:
Validation of the required challenges did not complete succesfully. DNS problem: NXDOMAIN looking up TXT for _acme-challenge.www.contoso.com
the only odd thing i could notice its that the value for the domain root never change but the one for the www change every time i relaunch the petition.