SSL VPN - Accessing Internal Network Resources - UTM 9.4

Question

I am trying to set up an SSL VPN to access internal resources on a Windows domain. 
 
 I can connect to the VPN (using Active Directory credentials) and I can ping hosts by ipadress, host name or FQDN. 
 
 However, Exchange can't autodiscover and I can't access network shares (either by host name or IP address - although I can ping the host). 
 
 By changing security settings in IE I can get prompted for my credentials and I can then authenticate to the site using AD credentials and access the site, i.e. Intranet. 
 
 Any advice on what I'm doing wrong ? 
 
 Thank you

Ozzy · Accepted Answer

Thanks, it was a combination of things; 
 
 External perimeter firewall was blocking access to VPN pool traffic. 
 
 I needed a SNAT rule on the UTM for this traffic