• RSS
  • Twitter
  • FaceBook

Exchange Server Forums

Forums | Register | Login | My Profile | Inbox | RSS RSS icon | My Subscription | My Forums | Address Book | Member List | Search | FAQ | Ticket List | Log Out

Exchange for Small company spread out over large geographical area

Users viewing this topic: none

Logged in as: Guest
  Printable Version
All Forums >> [Microsoft Exchange 2003] >> Installation >> Exchange for Small company spread out over large geographical area Page: [1]
Login
Message << Older Topic   Newer Topic >>
Exchange for Small company spread out over large geogra... - 23.May2008 2:20:43 PM   
aptsa

 

Posts: 2
Joined: 23.May2008
Status: offline
I am a sys admin for a small utility with 10 satelite offices averaging about 15 users per office.  Some only have about 5 users and a couple have as many as 35 users.  Anyhow bandwidth is our main concern, since the more bandwidth we use the less we have to sell to customers (we provide DSL to our customers).   Our branch offices have a VPN to the core with a guarantee of 128kbs with a 256kbs burst.  Our internet operations our based in City A where we have our core in a colo facility with AT&T.  The corporate office is a spoke off the core and we are connected with a VPN.  The Corporate office has a T1 and is located in another state.  The branch offices each have DC's and connect to the corp office via colo core with Citrix to run billing and accounting applications.  We ran Exchange 5.5 in the past out of the Corp office but experienced too many complaints with bandwidth problems interfering with Citrix.  The rural users had pst files and would use exchange for download email.  At that time we were using 96k frame relay pipes.  The Internet group moved us on to a Linux Sendmail solution that works but does not have the feature that we need at this time.  Anyhow I am looking for advice on architecting a solution for our network.

My intial thought was put an Exchange server in the colo, but since it is remote I would need a failover server as well.  I was also thinking I might put a server in the HQ building and maybe put a server in another large office.  Of course the cost may be getting out of hand for our network but could I put exchange on a DC and forward all internet emails to a main server in CityA?  Or would putting it on a DC be to much an issue with security?  Also if I have a distributed Exchange deployment, would this work with an OWA server in the Colo?  Using Exchange on Citrix will not fly b/c most users dislike using this program anyhow.  I apologize for the book but I wanted to give the whole scenario.  Any suggestions or comments are appreciated.
Post #: 1
RE: Exchange for Small company spread out over large ge... - 23.May2008 5:37:16 PM   
mark@mvps.org

 

Posts: 6811
Joined: 9.Jun.2004
From: Philadelphia PA
Status: offline
If Outlook over Citrix sucks when you're pretty much stuffed as it's the most efficient protocol between ICA/OWA (HTTPS) and RPC over HTTPS (Outlook Anywhere).
I'd trial some users on RPC over HTTPS and you'll just have to spin it in such a way that it's the best solution available because you can't afford a server for 5/15 people and can't afford a network upgrade (which would still mean you implemented RPC over HTTPS anyway)

_____________________________

Mark Arnold (Exchange MVP)
List Moderator

(in reply to aptsa)
Post #: 2
RE: Exchange for Small company spread out over large ge... - 23.May2008 7:00:42 PM   
Sembee

 

Posts: 4093
Joined: 17.Jan.2008
From: Somewhere near London, UK
Status: offline
I would agree with Mark.

It isn't clear from your question whether you were doing everything through Citrix in the past, or just publishing Outlook.
If you were just publishing Outlook and using local data such as PST files then that was the problem with its performance in the past.

If a client came to me with the question then the solution I would be recommending is a fully centralised deployment. Exchange, domain controllers, file servers, Citrix/TS servers, the lot all located centrally. The users would not have any local data, their workstations would be RDP/Citrix clients and over time replaced with thin clients. You seem an ideal candidate for that kind of deployment.
A full desktop is well suited for low bandwidth - you have enough to run the concurrent sessions at a decent speed - it will run over as little as 28k per user.

Simon.

_____________________________

Simon Butler,
Exchange MVP
Blog: http://blog.sembee.co.uk/
Web: http://www.amset.info/
In the UK? Hire me: http://www.sembee.co.uk/
Exchange Resources: http://exbpa.com/

(in reply to mark@mvps.org)
Post #: 3
RE: Exchange for Small company spread out over large ge... - 23.May2008 7:47:23 PM   
aptsa

 

Posts: 2
Joined: 23.May2008
Status: offline
Citrix has been used for Accounting and Billing apps only.  Previously we ran Exchange outside of Citrix.  So the users had Outlook installed locally and pst files.  Anyhow I will test the RPC over Https because it is too hard to sell Fully centralized deployment using Citrix for political reasons. 

I had thought that maybe I could distribute exchange servers into 3 service areas that emcopass office in close proximaty, but I would only want internet connection at the main server and I would only want to maintain one OWA sever for road warriors.   I'm not sure that a central OWA server could effectively communicate to the distributed Exchange servers over the WAN.


(in reply to Sembee)
Post #: 4
RE: Exchange for Small company spread out over large ge... - 24.May2008 3:22:10 PM   
Sembee

 

Posts: 4093
Joined: 17.Jan.2008
From: Somewhere near London, UK
Status: offline
It is unfortunate when office politics get in the way, as I firmly believe a Citrix/TS solution is best.
If you want a single server accepting email, OWA etc, then you are going to have problems with performance because of the bandwidth. While you continue to operate with those bandwidth restrictions any solution that does not use centralised type services so that you can minimise the use of bandwidth is going to be a problem.

Simon.

_____________________________

Simon Butler,
Exchange MVP
Blog: http://blog.sembee.co.uk/
Web: http://www.amset.info/
In the UK? Hire me: http://www.sembee.co.uk/
Exchange Resources: http://exbpa.com/

(in reply to aptsa)
Post #: 5

Page:   [1] << Older Topic    Newer Topic >>
All Forums >> [Microsoft Exchange 2003] >> Installation >> Exchange for Small company spread out over large geographical area Page: [1]
Jump to:

New Messages No New Messages
Hot Topic w/ New Messages Hot Topic w/o New Messages
Locked w/ New Messages Locked w/o New Messages
 Post New Thread
 Reply to Message
 Post New Poll
 Submit Vote
 Delete My Own Post
 Delete My Own Thread
 Rate Posts


Follow TechGenix on Twitter