Exchange 2003 OWA vs Outlook 2003 bandwidth requirements

Exchange 2000


  • 1. OWA giving errors on NEW and Delete links
    I'm using OWA on W2k3 ans ESE2k3 server. When I access OWA from the web I get the email page just fine. When I try to use the NEW Message and the Delete Message option I get and Error on the Browser (Lower right corner) and nothing happens. What am I doing wrong??? -- Mark
  • 2. SMTP Relay Setup - Spam Filtering
    Does anyone know of any good tutorials on setting up a smtp server in the following situation. I think i have my setup right and i want to see what i may have done wrong I have one server that i use for inbound mail filtering for spam (WEBSERVER) and av and then my exchange server. (EXCHANGE) My internet mx says send all email to WEBSERVER.MYDOM.COM. This server is AFAIK successfully receiving email sent from outside. WEBSERVER filters the email and then sends to EXCHANGE.MYDOM.COM. WEBSERVER has my domain setup as a remote domain and set to forward using smarthost, the ip of EXCHANGE is entered in brackets in the box. I also have the allow incoming email to be relayed to this domain box checked. On EXCHANGE I have the IP of WEBSERVER in the allow relay settings. When WEBSERVER tries to send email to EXCHANGE I do see a connected session in the current sessions view, that session will last as long as my timeout settings allow (10 minutes). After which the connection is dropped and i get and Event ID 4006 on WEBSERVER: Message delivery to the host '10.x.x.x' failed while delivering to the remote domain 'MYDOM.COM' for the following reason: The connection was dropped by the remote host. What have i done wrong? what do i need to fix? Thanks
  • 3. study guides are best for IT certifications study guides are best for IT certifications
  • 4. Changed ISP providers and external ip address
    I have an exchange server that we moved from another building to a new one. We had to change ISP providers and get a new external ip address. What needs to be done to set up with the new ISP provider and the new external ip address? Do I change the MX record and A record to point to new external ip address? Is this right and what else might I do. Do I have to change any setting on the exchange server itself? Thanks

Exchange 2003 OWA vs Outlook 2003 bandwidth requirements

Postby claire » Wed, 21 Jan 2009 00:06:17 GMT

All I have a customer that has proposed to have users in a remote site
use OWA (2003) instead of outlook 2003 to save bandwidth. I had my
doubts on whether this would actually save any bandwidth and looking
at Microsofts White paper ( http://www.**--****.com/ 
client_network_traffic_with_exchange_2003_v1.1.doc) they seem to come
to the same conclusion, Outlook 2003 in cached mode is overall more
bandwidth efficient.

Anyone got any thoughts on this or have tried it themselves.?


Re: Exchange 2003 OWA vs Outlook 2003 bandwidth requirements

Postby Andy David {MVP} » Wed, 21 Jan 2009 00:10:22 GMT

On Mon, 19 Jan 2009 07:06:17 -0800 (PST), claire

Personally, I would opt for cached mode everytime. Outlook 2003 is a
much better client and experience besides the bandwidth issues.

Re: Exchange 2003 OWA vs Outlook 2003 bandwidth requirements

Postby Martin Blackstone [MVP] » Wed, 21 Jan 2009 00:30:55 GMT

I would use cached mode Outlook. The user experience is TONS better and I 
would be willing to bet the bandwidth differences would be negligible.
In other words, don't punish the users. 

Similar Threads:

1.Outlook 2003 Bandwidth Requirements

Anyone know what the minimum/recommended bandwidth requirements are for an 
Outlook 2003 client connecting to an Exchange 2003 SP2 server?

2.OWA 2003 vs Outlook 2003/Outlook 2003 RPC/HTTP

Hi all,

I would like to get your feedback regarding a customer scenario. Customer 
has 2 sites, 1 with 1000 users and 1 with 500, Sites are connected thru 4x2 
Mbps lines

They want to deploy an Exchange 2003 cluster in the biggest site and they 
would like to avoid the need of deploying aditional mailbox servers in the 
second site and the question is what the recommended client in this scenario 

They want to deploy a FE/BE topology with a FE in the second site. they have 
DCs and GCs in the second site, and they are asking what client will provide 
the end users the best performance.

I have been reading many documents and seems Outlook 2003 with Cache mode is 
the best option (here they would not install the FE), then Outlook 2003 
RPC/HTTP as the second one and finally OWA

From your experiences what is the best client we can deploy in this 
centralised topology, giving the end users the best performance?


3.Outlook 2003 Exchange Cached Mode bandwidth usage

Does any have some figures about the bandwidth usage per user for Outlook
2003 in Exchange Cached mode?

I would like to be able to calculate the needed bandwitdh for a number of

Let's say if you have 10 users how much bandwidth is needed? what is there
are 20? or 50?

Some comparison between online and cached, or XP/2000 could also be usefull?

So does anyone have some figures for me?


4.Outlook 2003 via POP3 to Exchange = BANDWIDTH HOG!

Hi all,

I'm not sure of the right way to phrase this, but we have our
bandwidth-metered Exchange server in a colocated environment. I use
Outlook 2003 to check mail from this machine using POP3, because I
don't want to go the MAPI route. I pretty much have my computer on all
the time, and Outlook is always open.

I discovered today that Outlook is consistently eating up an average
of 3 KB per SECOND in conversations with the Exchange Server over
POP3. Now, I have it set to check for messages every 1 minute, which I
know is a lot, but honestly, I never dreamed it would eat up so much

The question, of course, is what is going on between Outlook and
Exchange that requires so many bytes? The one thing I can think of is
that I leave all of my messages on the server so I can use the web
client when I'm traveling, and I'm up to around 3000 now, but I never
expected that this would somehow affect ongoing bandwidth.

Any ideas? Is Outlook possibly telling Exchange about the messages
I've already retrieved with every single request?



5.Outlook 20007 bandwidth requirements


Do we have any documents, which states the bandwidth usage/requirements for:

1)  Outlook 2007 client with Exchange 2007
2)  OWA 2007 with Exchange 2007

Trying to see if a 1400 mailboxes will work over a 10mb link, with outlook 
clients (outlook 2007)

Need to do a proof of concept.  Just like how Microsoft has consolidated 
most of its exchange server.   Most exchange servers in MS are in US, while 
its users are all over the world.

Any input would be appeciated.


6. bandwidth requirements for Outlook

7. Outlook MAPI bandwidth requirements

8. Outlook 2003 on Win 2003 vs. exchange 2003

Return to Exchange 2000


Who is online

Users browsing this forum: No registered users and 72 guest