Conversation view in OWA 2010 - Super-duper slow expansion

Hello,
I know it has been asked countless time to disable conversation in OWA and that it can't be done. I think it's a great feature but the problem we face is that conversation expansion take a very (very) long time, sometimes looping forever when access externally
through TMG 2010. This give users the feeling that OWA 2010 is unusable and they have to use the "light" interface to be able to get any work done.
Internally, everything is lightning fast but through TMG 2010 I can count the sheeps before the conversation expand (from 2.5 seconds to 10+ seconds).
I've been googling for months around the problem without finding any answer. To clarify, everything else is working fine (message preview is fast, folder browsing is fast, etc). The problem is that users try to double-click to open a message instead of using
the preview pane actions (which expand the conversation). After the delay (that sometimes get stuck and loop forever) they have to double click the message again to finally be able to reply and/or read it.
Any ideas ?
Thanks

I can honestly say that, being a member of the ISA/TMG team at Microsoft, I have worked tons of OWA Publishing issues through both ISA and TMG. I have never once heard a customer report this particular issue. I disagree with Xiu when he says he suspects
a TMG configuration issue. Usually the TMG configuration is pretty cut and dry. It either works or it doesn't. The fact that everything else but conversations works fine is another factor that leads me to believe TMG is not the culprit here. Whenever there
are performance related issues where something is "slow" it is most often a symptom of something else that is wrong in the environment. It could be networking issues, it could be too much load on the Exchange servers, it could be bad NIC drivers, etc. There
are a whole lot of variables involved.
I think the heart of your question was is there a way to disable Conversations in OWA. That is certainly a question for the Exchange folks because there is no way to disable this through TMG.
The bottom line is that this is a pretty complex issue and will be very difficult, if not impossible, to troubleshoot via this forum. My recommendation is that you open a support case with Microsoft originating with the Exchange team. They can pull in the
TMG team as needed. You are going to need to get traces from "end to end" to figure out exactly where the slowdown is occurring. This will involve a tool such as HTTP Watch on the client, Netmon captures taken on all involved adapters on TMG, and Netmon captures
taken on the Exchange servers as well. Additionally you will probably need to temporarily bridge your traffic between TMG and Exchange to HTTP so the traces can be read and conversations followed. It will still be encrypted between TMG and Client and that
is what HTTP Watch will help us with.
You may get lucky and someone that had this exact issues see it and responds but it sounds like you have already put a lot of hours in trying to figure this out. It would probably be worth the price of a Support Incident at this point.

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    eFrameworks/DTMessageQueueing.framework/Versions/ADec 30 10:00:45 MacMini com.apple.backupd[2388]: Stopping backup.Dec 30 10:00:45 MacMini com.apple.backupd[2388]: Error: (-8062) SrcErr:NO Copying /Developer/Library/PrivateFrameworks/DTMessageQueueing.framework/Versions/A/DTM essageQueueing to /Volumes/Backups/Backups.backupdb/SNOWSERVER/2010-12-30-09403
    3.inProgress/02385079-1749-4E5A-BC4F-93367E30B581/MacMini/Developer/Library/Priv ateFrameworks/DTMessageQueueing.framework/Versions/A
    Dec 30 10:00:45 MacMini com.apple.backupd[2388]: Copied 13388 files (10.5 GB) fr
    om volume MacMini.Dec 30 10:00:45 MacMini com.apple.backupd[2388]: Copy stage failed with error:11Dec 30 10:00:46 MacMini com.apple.backupd[2388]: Error: (22) setxattr for key:co
    m.apple.backupd.ModelID path:/Volumes/Backups/Backups.backupdb/SNOWSERVER size:1
    0Dec 30 10:00:51 MacMini com.apple.backupd[2388]: Backup failed with error: 11Dec 30 10:06:19 MacMini mds[42]: (/Volumes/Backups/.Spotlight-V100/Store-V1/Stores/A3D115A8-4546-4A3B-B36E-59440 4EEA098)(Error) IndexCI in ci_ftruncate:ftruncat
    e(34 /Volumes/Backups/.Spotlight-V100/Store-V1/Stores/A3D115A8-4546-4A3B-B36E-594404 EEA098/live.0.indexDirectory, 16448) error:22Dec 30 10:06:19 MacMini mds[42]: (/Volumes/Backups/.Spotlight-V100/Store-V1/Stor
    es/A3D115A8-4546-4A3B-B36E-594404EEA098)(Error) IndexCI in expandMap:ftruncate err: 22
    Here is another one:
    Dec 30 10:06:20 MacMini mds[42]: (Normal) DiskStore: Creating index for /Volumes/Backups/Backups.backupdb
    Dec 30 10:14:12 MacMini ntpd[33]: time reset -0.496024 s
    Dec 30 10:29:48 MacMini ntpd[33]: time reset -0.481983 s
    Dec 30 10:42:31 MacMini com.apple.backupd[2388]: Starting standard backup
    Dec 30 10:42:31 MacMini com.apple.backupd[2388]: Backing up to: /Volumes/Backups/Backups.backupdb
    Dec 30 10:42:35 MacMini com.apple.backupd[2388]: Error: (22) setxattr for key:com.apple.backupd.ModelID path:/Volumes/Backups/Backups.backupdb/SNOWSERVER size:10
    Dec 30 10:42:35 MacMini com.apple.backupd[2388]: Detected system migration from: /Volumes/Christopher-J-Shakers-Mac.local
    Dec 30 10:42:37 MacMini com.apple.backupd[2388]: Failed to create progress log file at path:/Volumes/Backups/Backups.backupdb/SNOWSERVER/2010-12-30-094033.inProgress/ .Backup.315427357.871281.log.
    Dec 30 10:42:37 MacMini com.apple.backupd[2388]: Error: (-50) Creating directory 61478D74-6407-4DBA-A98D-8A20EC6F2140
    Dec 30 10:42:37 MacMini com.apple.backupd[2388]: Failed to make snapshot.
    Dec 30 10:42:37 MacMini com.apple.backupd[2388]: Error: (22) setxattr for key:com.apple.backupd.ModelID path:/Volumes/Backups/Backups.backupdb/SNOWSERVER size:1
    0Dec 30 10:42:42 MacMini com.apple.backupd[2388]: Backup failed with error: 2
    So far, it has been running ok on that disk since I force unmounted it and used disk warrior to rebuild its directory structure.
    While I was visiting my sister-in-law over Christmas, I had to resurrect Time Machine on my old PowerMac dual G5 I gave her. It's backing up to an internal SATA drive that I previously tested quite extensively. I had to use Disk Warrior to rebuild the directory structure on that disk as well to get Time Machine working again.
    It seems to me that time machine, or the device drivers it relies on, needs some work.
    Chris Shaker

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