When using the term “Exchange Mailbox”, we are using an “alias” for a Database that hosted on the Exchange server.
We can describe the OWA (Outlook Web Application) mail client as a “viewer” for the data that stored in the Exchange database, and the Outlook mail client as a “viewer” for the database (OST File) that stored on the user desktop (Hard drive). WAN environment: When using a local Exchange Server (on-premises), Outlook synchronizes data to and from the Exchange Mailbox, by using a local LAN infrastructure.
One of our users complains that he cannot synchronize mail from his Mailbox in the cloud (Exchange Online).
We try to use a couple of tricks (usually turn off and turn on windows), but no luck.
First open exchange EMC and see that the databases are mounted.
Also open the exchange queue viewer under toolbox in EMC. Also dumb thing to check, is there enough space left in your drives for exchange?
We have the following setup: Big Hyper-V machine hosting the servers as VM's VM for CAS: WEB. XXX.local Servers are running Server 2008 R2 with Exchange 2010 SP1 Clients are all running Windows 7 Pro x64 with Outlook 2010 x64 The problem we're having is that nobody is able to see any emails received today (16th of October), but they are able to send externally.
When I reply back to the email received externally, I don't get an NDR, yet the user cannot see my email.
Resolution 1: Clear Offline Items Most Exchange account configured in Outloook has Cached Exchange Mode enabled by default to allow user to continue working with Outlook when offline in addition to improve the performance.Well this was a very well known issue as the title explains but in my case, the "updating inbox 3.99GB" keeps on repeating to the same state.No new mail activities or even download progress on Inbox, but the other folders at least updating upon selecting.To be exact, I have created a new profile and kept it to download but still the problem persists. I can assure there's no issue as other users are able to communicate without any issues. If you feel the issue is not resolving itself I would recommend checking out the Outlook Support and Recovery Assistant Here: https://configure.office.com/sara/Setup Consider changing how much email you are downloading as well to keep offline.Start low - and you can increase it as you validate it if you need too.I can see about 23K mails when I check the synchronization through the inbox properties.And somehow, it had updated up to 15K and now nothing happens. It appears like what @RDrast has already pointed out.Each time we open Outlook, the synchronization process start and stop in the middle, for some reason, we cannot figure. The less good news is that there are many grounds for this issue, and there is no “magic” solution that will help us to solve the synchronization problem in “one click.”In this article, we review the cases and the troubleshooting steps for mitigating optional causes for Outlook synchronization problems in Office 365 environment and review the specific charters of Outlook and Exchange Online environment.I know that this article could consider as “long and tedious” but the Murphy law dictates that: most of the Outlook synchronization problem accrues to “VIP Users,” that usually demand a solution!Using a local copy of the Mailbox content should significantly improve the Outlook performance (response time) because access to the “data” (Mail items) created by using a local copy of the Mailbox that stored on the local drive.Instead of “fetching” the mail from the remote Mailbox, each time a user click on the mail item.