[THIN] Re: Exchange 2007 and Citrix
- From: "Berny Stapleton" <berny@xxxxxxxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Thu, 17 May 2007 17:11:12 +0100
Just a bit of background on this:
Cached mode changes around the way that MAPI works, the biggest benefit here
is remote users, especially ones running ActiveSync.
If you have users who have a continual active sync running, when running
cached mode, this syncs with Outlook only. If you turn off cached mode, the
MAPI service is continually connecting back to the exchange service, which
means that each user chews through about 256K worth of bandwidth. MS's
figure was that each Outlook client uses about 9.6K of bandwidth, but I am
not sure where this figure came from and under what conditions. This might
work on average, but it's still burst traffic (File attachments etc aren't
streamed at low speed).
There was synchronised folders previously that allowed offline access,
cached mode took it a step further and changed around the way that MAPI
works.
Berny
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Brian Ehlert
Sent: 17 May 2007 16:18
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Exchange 2007 and Citrix
It is not required, but it is on by default.
(Outlook can be installed with a transform to change this default behavior)
If your citrix servers and the exchange server are on the same LAN you
will see no benefit from caching (you might see degradation from a
user perspective).
Outlook caching is just Microsoft's way to get around the preview pane
that every-user loves so much. Preload the entire message before you
present it to the user.
If you are crossing a WAN between the farm and the exchange server,
you will have happier users with caching on. They won't experience
the 'hang' as outlook loads the message from teh exchange server.
The assumption is that Outlook is run locally on a client and Exchange
is distant, (the branch office with PCs)
On 5/17/07, Peterson David <DPETERSO@xxxxxxxxxxx> wrote:
>
> I'm not the Exchange administrator, but am trying to get a handle on this
> from a Citrix perspective. Our Exchange admin has told me that cached mode
> is required for Exchange 2007 and the next version of Outlook. I of course
> have disabled cached mode on my Citrix boxes. Several consultants have
told
> our admin this, but no one can explain how this works in a Terminal
> Services/Citrix environment. I want to still provide Outlook on Citrix,
but
> do not want everyone's mailbox cached on the server. We are finally moving
> to an archived solution to get a handle on mailbox sizes (many are in the
> gig+ range, some upwards of 8-10 gig) but it still will be a problem just
in
> terms of hard drive space.
>
> Is there a solution for this?
>
> Thanks
>
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