I have an Exchange 2013 running on Server 2012 R2 and have a mixed environment with some computers on the domain (and autodiscover works perfectly) and some workgroup computers that use Outlook Anywhere. I have 6-7 computers successfully using this (winxp, vista and 7 clients) and the customer recently purchased two new windows 7 clients that refuse to work. We continually get the error that the exchange server is not reachable (sorry for paraphrasing I dont have the error in front of me).
The local IP of exchange is 192.168.1.13 and I am able to ping it by IP and by hostname mail.domain.com. nslookup returns the correct IP when performing a lookup on mail.domain.com. https://mail.domain.com/OWA works perfectly fine on the same computers that refuse to connect with Outlook Anywhere. So that also tests the creds we are using and confirms they are correct.
I disabled the firewall and AV on the computers to rule that out. I also ran the following cmdlt without error:
get-outlookanywhere | set-outlookanywhere -internalhostname mail.domain.com -externalhostname mail.domain.com -internalcientsrequiressl $true -externalclientsrequiressl $true -defaultauthenticationmethod ntlm
I have valid DNS entries for both the local zone and external zone including the autodiscover. I am using a real UC SSL cert not self signed and the cert matches the names we are using.
I am at a loss of what else to check or how to get more diagnostic info.
Thanks in advance.