Cause: Outlook is set to work offline. On the Outlook menu, make sure that Work Offline is not checked. If it is, click Work Offline to remove the check mark and work online.
How do I turn off offline mode in Outlook Mac?
Click the Tools tab on the ribbon, then click the on/off switch for Online/Offline. You may need to click the switch to take Outlook completely offline, then click it a second time to bring all accounts back online if you have multiple accounts in Outlook, but only one account is currently offline.
How do I get Outlook for Mac online?
1 Add Outlook.com Account to macOS Select the Apple menu, then select System Preferences. Select Internet Accounts, then select Add Other Account. Select Mail account. Enter Your Name, your Email Address, and Password, then select Sign In.
Why is Outlook stuck in offline mode?
A corrupt or damaged Outlook profile can prevent Outlook from authorizing and connecting to the mail server. Due to this, we get an error usually called Outlook stuck in offline mode.