Cannot open the Outlook window. Check if you’ve configured Outlook to run in compatibility mode (either manually or by running the Troubleshoot Compatibility wizard). If the compatibility mode ...

Only Outlook 2010 and 2013 have the compatibility tab, according to Microsoft, which means this step isn't applicable to your specific issues if you're using Outlook 2016.

Here, you can unselect the addons you want to disable and relaunch Outlook. Similar: Cannot start Microsoft Outlook, The command line argument is not valid. 2] Turn off Compatibility mode in Outlook.

Microsoft has fixed a known issue that will cause the classic Outlook email client to crash when opening emails or starting a ...

Meanwhile, 365 Enterprise users have a date for new Outlook rollout Microsoft has admitted that an issue in Windows 11 24H2 could stop Outlook from starting. It has also been confirmed that ...

Cannot open the Outlook window. The set of folders cannot be opened. The attempt to log on to Microsoft Exchange has failed ” when trying to open the program.

Microsoft is working to address a known issue affecting Outlook for Microsoft 365 customers, causing slow starts and freezes as if Offline Outlook Data Files (OST) are being synced right after launch.

Microsoft confirmed another known issue in Windows 11 version 24H2. This time, it impacts Outlook, but the fix is available.