Server 2012 R2 VM with IIS forcing ABYSS on install

[CptUnderpants]

I'm installing v14 in my test environment which is a domain network (no Exchange) on a new VM joined to the domain which has IIS already installed but when it comes to selecting which web server to use, the options are greyed out and ABYSS preselected. I wanted to use IIS.

Any suggestions as to why it would behave in this way and how to get around it?

Update: I've attempted the same install on a different VM on a different hypervisor on a different network connected to a different domain (still 2012R2 with IIS installed) with exactly the same results. Can't select IIS.

 

[CptUnderpants]

I have isolated the issue. It isn't documented in the installer but selecting "I do not have a FQDN" will prevent selection of IIS.

 

[NickD_3CX]

It is actually mentioned in the V14 manual found here:
http://www.3cx.com/docs/installing-3cx/

Specifically it says:
"No FQDN - If you do not want to connect to the PBX from outside the LAN, you can specify a local IP. IP phones or clients can not be used outside the LAN. Abyss must be used as the web server."

 

[CptUnderpants]

It is actually mentioned in the V14 manual found here:
http://www.3cx.com/docs/installing-3cx/

It would be worth having it mentioned in the installer like many other installation notes are. I was doing this install during 3CX training and I asked the trainer. Even he didn't know why it wouldn't let me use IIS.