To make sure that shared folders are properly downloaded to the Offline Outlook Data File when Cached Exchange Mode is turned on, you will proceed as follows: Click File More Settings. If the syncing problem still persists with the new Outlook profile, then the problem might be elsewhere.
On the Advanced tab, under Cached Exchange Mode Settings, make sure the checkboxes “Download shared Folders” and “Public folders favorites” are selected. The network infrastructure might have some problem, permissions might not have properly replicated across the infrastructure after the shared mailbox owner granted the target user with permissions and many others.
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Restart Outlook, re-enable the checkbox and see if the issue persists. To add the Shared Mailbox to the new Outlook profile, follow the step above: “How to add an additional shared mailbox in Outlook“.
When Cached Exchange Mode is turned on, shared folders—the folders available in your shared mailbox—are downloaded (in the file) to the local computer. Check if the Shared Mailbox is synchronizing properly on the new Outlook profile.
If your email account is hosted by Microsoft on Outlook.com, Office 365 or an Exchange Server 2016 running on Windows Server 2016, you might be greeted with an error message when trying to send an email with i OS 11.
“Apple is working closely with Microsoft to resolve the issue and will release a fix soon in an upcoming software update,” according to the support document.
The Outlook for i OS client fully supports various email services, including Outlook.com, Office 365, and Exchange Server 2016.
If you use the Mail app to sync data from Exchange Server 2016 that is running on Windows Server 2016, you can ask the system administrator to disable HTTP/2 in Windows Server 2016 as a workaround.
This allows us to access e-mail, calendars, contacts, tasks, and other mailbox content when something is wrong with Outlook.
Just go to https://login.microsoftonline.com, provide your credentials (Outlook email address and password) and log in. If the Mailbox is available and properly synchronizing via Outlook Web App, this means that the issue is local, with Microsoft Outlook, and you will need to investigate further.
Depending on the infrastructure Office 365 is relying on, a shared mailbox added using a different method than the one shown below might not work as expected, or might produce error messages. There are two main actions the mailbox owner will need to take in order to provide another user with access to the shared mailbox. Select the permission level you want to assign for each section: Calendar, Tasks, Inbox, Contacts, Notes. See below for help on how to proceed if the shared mailbox is not syncing. The Offline Outlook Data File (.ost) is a synchronized local copy of your mailbox saved on your computer, and is stored in the following default location (which might vary depending on the client version and the Outlook account type): C:\Users\App Data\Local\Microsoft\Outlook The Offline Outlook Data File, however, can get corrupted or become unreadable from within Outlook.