If it’s coming in an Online web App but not visible in Outlook desktop App, then this would probably due to server-level problems. Generally, the shared mailbox should automatically come up when a user configures its account in Outlook. Workaround #1: Adding Additional Shared Mailbox in Desktop Outlook

Exporting Shared Mailbox from Office 365 into Outlook App.

Troubleshooting Shared Mailbox Synchronization.

Adding an Additional Shared Mailbox in Outlook.

To solve this query we have come up with 3 workarounds, such as: Methods to Resolve ‘Office 365 Shared Mailbox not showing in Outlook’ Issue Like Leeman Tanacio, there are multiple other Office 365 users who face difficultly as their Office 365 shared mailbox is also not visible in their desktop Outlook, whereas it’s visible in Outlook web app.

Therefore, in this blog, we will be presenting the solutions for the common issue faced by many uses, that is “Office 365 Shared Mailbox not showing in Outlook application (desktop)”. However, some users face issues while accessing a shared mailbox is MS Outlook application. Assigned users can access these shared mailboxes in their Outlook application. We can also say that a shared mailbox is a centralized service that allows multiple uses to work in a synchronized manner. Each and every user is able to read and send emails depending upon the permission provided by the Admin. Shared Mailbox in Office 365 is a mailbox that can be accessed by all the users who have been granted permission for accessing it.

Signatures not opening outlook