The following errors occurred for me one by one while trying to use Outlook on Windows 11 after updating it to the latest version. Outlook cannot log on. Verify you are connected to the network and ...

Microsoft has fixed a known issue affecting Outlook for Microsoft 365 users since June and causing slow starts and freezes as if Offline Outlook Data Files (OST) were syncing right after launch.

Are you receiving—Couldn’t sign you in. This browser or app may not be secure. Try using a different browser. If you’re already using a supported browser, you can try again to sign in—when trying to ...