So if you are still struggling, make sure the Mac user has their Outlook version up to date. This is because at the time, shared mailboxes were not supported:

The Mac user was using the version of Outlook bundled with Microsoft Office 365. I figured this out because in March 2021 I created a shared mailbox in an Exchange Online (office 365) admin center (no on-premise) and while Outlook users using Windows were able to get the shared mailbox to show up, one Mac user was not able to get the mailbox to show up. Open Finder, Press Command + Shift +g - In the dialog, enter /Library and click go. You can follow the steps below to backup these folders and delete them. 2: Clear the Office preference and cache files which the issue could be caused by these files’ corruption. Prior to September 2021, this was not possible. If you have an Microsoft 365 for home subscription, or you purchased a one-time download of Office 2016, click the Contact Us link at the bottom of this page. 1: Enter Mac Safe Mode to isolate the issue caused by the other programs. If the gateway doesn’t support WebSocket then the client will fall back to using plain https channel. Choose + to add a shared or delegated mailboxĬheck this article for details Open a shared Mail, Calendar or People folder in Outlook for Mac () We have triaged an issue and working on a fix When connecting to an on-prem deployment gateway, the client by default will try to connect via WebSocket first.In the Tools menu, choose Accounts, and select the account that has access to the mailbox.To add the shared Outlook mailbox on Mac: To get comma as separator, I would suggest you change region in Mac icon at top menu>System preferences>Region & Language>Select US as preferred region, restart Mac and check the result. As of Sept 2021, you are now able to add shared mailboxes to Outlook for Mac, it just takes some extra steps: Question 1: the separator in formula is related to your region setting in Mac OS system preferences.

Microsoft 365 not working on mac