Outlook 2007 Reading Pane flickers within RDP session

Hi All ,

Have an issue at a client of mine where ~40 users remote into a Server 2008 R2 RDS Server. At least a dozen staff there have reported from time to time when they open outlook within their RDS profiles, the reading pane flickers. No other part of Outlook flickers, just the reading pane. There is no further user activity when the reading pane flickers (ie: user clicks on a message, message appears in preview pane and starts flickering immediately - user is not scrolling over the message or moving the mouse at this point).

Relatively straight forward setup:
RDS Server is a virtualised on a VMware ESX server (24GB RAM assigned to VM)
Server 2008 R2 Enterprise SP1 with RDS role with all updates to date
Outlook 2007 SP3 with all updates to date
Outlook for all profiles are connecting to Exchange 2010

Clients RDP from workstations with current version of RDP client (7.0)
All workstations connect via gigabit.

Thanks in advance for any help/suggestions.
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The fix for this is turn on cached mode. It only affects people with large amounts of mail in folders. Bringing the volume of mail down fixes it also.
Did you consider changing RD client color depth?
The flickering happens with HTML mails after the external content has been downloaded?
Did you get anywhere with this? I haver the same issue with outlook 2010 and scrolling down through mails resets as well as flickers as you watch it.. strange thing is it only recently started happening as it was fine for months.
Karen FalandaysTraining SpecialistCommented:
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