I have a client running Exchange on Office 365 with all end users running Office 2013. One user is reporting that they will receive a new message notification and see the unread count in the navigation pane. However frequently they are reporting that it can take up to several minutes for the actual message to show in their inbox. I have configured their account on a test machine so that I can monitor and test without taking up their time. I have seen the problem happen at least twice and am at a loss for why this is happening. It is worth noting that before moving away from their on-site Exchange the user never reported this issue.

• Edited by cmarrier 14 hours 5 minutes ago

Does this user have a lot of Email Rules configured?  That would the first place I would look.  If they do have rules configured, maybe try disabling all the rules and see if the behavior still occurs.

Also check for any sync errors.  I could see a corrupt email message causing this behavior if Outlook keeps trying to download the message, then fails and downloads the rest of the emails.

• Edited by Corey Riley 13 hours 46 minutes ago

The user has no rules configured. I found no sync error logs but will look again when I am able to duplicate the issue on my test machine. If I find any, will post them here.

Thanks.