We saw this issue as well a few times after installing Exchange 2010 SP2. In our case the perceived ‘batch’ deliveries occurred after the client had been idle for a while and then performed an action in Outlook (switch folders, send a message, etc.). The problem only effected MAPI (Outlook online and Outlook Anywhere clients) users. EAS, POP/IMAP, and OWA users continued to function normally. Rebooting the CAS server temporarily fixed the problem. We installed RU1 for Exchange 2010 SP2 about two weeks ago and haven’t had a reoccurrence since. I’m not sure if RU1 really did anything (I didn’t see anything for our issue in the list of fixes), but it might be worth a shot.
From: Richard Stovall [mailto:rich...@gmail.com] Sent: Tuesday, February 28, 2012 9:00 PM To: MS-Exchange Admin Issues Subject: Re: Outlook Delays since Exchange 2010 SP2 applied Curiously, I had a similar report today after applying SP2 last weekend. The report was from a user with multiple mailboxes configured in Outlook 2010. She stated that she never saw a particular inbound message (cached mode) in Outlook, but did see it in OWA. The mailbox in question is accessed by 6 users, all on Outlook 2010 except one who is on a Mac with Mac Outlook 2011. The user in question was on a Mac until a few days ago, and had become accustomed to the vagaries of Mac Outlook 2011. That's why she checked OWA out of habit. On Tue, Feb 28, 2012 at 9:44 PM, Alice Goodman <ali...@mckinstry.com<mailto:ali...@mckinstry.com>> wrote: Outlook 2010 both in cached and non-cached mode. Email shows up in OWA or on mobile phones prior to Outlook. I ran Remote Connectivity Analyzer and any errors are certificate based and explainable, and I even pointed Exchange towards a different DC to see if that makes a difference and it does not seem to. Alice From: Michael B. Smith [mailto:mich...@smithcons.com<mailto:mich...@smithcons.com>] Sent: Friday, February 24, 2012 12:38 PM To: MS-Exchange Admin Issues Subject: RE: Outlook Delays since Exchange 2010 SP2 applied What version(s) of Outlook? From: Alice Goodman [mailto:ali...@mckinstry.com]<mailto:[mailto:ali...@mckinstry.com]> Sent: Friday, February 24, 2012 2:24 PM To: MS-Exchange Admin Issues Subject: Outlook Delays since Exchange 2010 SP2 applied I am having several users complaining about Outlook delays and what almost looks like “batched” delivery. In their, words, “I just had another random delay, this time on my own mailbox. Everything appeared fine, but then all of a sudden several emails all appeared at the same time that were actually delivered 10-15 minutes ago.” I did 2 things recently, put SP2 on Feb. 3rd and added an authoritative domain on Feb. 11th. My understanding is that the settings in Send/Receive do NOT impact Exchange users, only POP and IMAP. Any suggestions on where to start looking? Thanks, Alice Alice Goodman, MCSE, LEED® AP (BD+C) P 206.832.8295<tel:206.832.8295> | C 206.427.7760<tel:206.427.7760> | F 206.374.6814<tel:206.374.6814> Sr. Exchange Administrator McKINSTRY FOR THE LIFE OF YOUR BUILDING Consulting | Construction | Energy | Facility Services www.mckinstry.com<http://www.mckinstry.com/> --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist