Install IIS on RDS - Yes or No???

Hi Experts

What is the Best Practice re IIS & RDS services?

We have 2 VMs on a HyperV: DC + RDS (both WIndows 2016)
Our CRM, ACT! from Sage,  is currently installed on the RDS but is only used internally.
We need to install a IIS / Web Server to give remote access to ACT! via the web

Can I use the RDS to install these additional components? My instinct is to build a new VM and install ACT! on that VM.

What says you?

Alexandre MichelManager; IT ConsultantAsked:
Who is Participating?
Philip ElderConnect With a Mentor Technical Architect - HA/Compute/StorageCommented:
Given the situation we'd be setting up as follows:

VM 1: DC
VM 2: Broker/Gateway/Web
VM 3: Session Host

Putting incoming web requests on the same server that is shared by users is not a good idea. Keep everything distinct.

Plus, as a rule the Session Host gets a series of Group Policy settings that locks it down to help limit user's exposure and limit their impact in the case of a bad link click.
Lee W, MVPTechnology and Business Process AdvisorCommented:
Given it's purpose, I would be ok (not very happy, but ok) with running it on the RDS server.  HOWEVER, if budget is not a huge concern, I would recommend a separate server for the IIS implementation.
Alexandre MichelManager; IT ConsultantAuthor Commented:
I tried to find "Best Practices" online re IIS on RDS to no avail.
What are the Cons of doing it: Security? Resources? Compatibility?
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Lee W, MVPTechnology and Business Process AdvisorCommented:
That's because RDS with ANYTHING is generally BAD.  RDS should be RDS only.  But the realities of small businesses can SOMETIMES allow for exceptions.  IIS is a role that frequently gets added to supplement other capabilities.  While I can't say I've tried it, I would expect it to work without issue.  Security and Resources would be my concern... not mention that RDS servers may need to be rebooted more frequently than most other servers since many users use them.
Mike LazarusAct! Evangelist - CRM ConsultantCommented:
What version of Act!? The versions from Sage wouldn't be supported in the 2016 IIS and likely to have issues.

Also, how many users (local/web) are you expecting? It is possible to have the Act! database server and web server on different VMs to have better control of the necessary resources for each.
Alexandre MichelManager; IT ConsultantAuthor Commented:
Thanks Philip & Lee for your comments

Hi Mike,

we are looking at the latest version of ACT! Web edition to give our reps access to ACT! while on the road from their smart devices. So are you suggesting to build a server with WIndows 2013 instead to host ACT?
Mike LazarusAct! Evangelist - CRM ConsultantCommented:
If it's the latest (20.1) then it should be fine with 2016. It was your reference to Sage that made me think you have an old version.
For smart devices, I think you'd find Handheld Contact a better option -
Alexandre MichelManager; IT ConsultantAuthor Commented:
Thanks all for your feedback. we decided to create a new VM and thus NOT install IIS on RDS
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