A bug in classic Outlook hides the mouse pointer, making navigation difficult.

Microsoft notes that a disappearing mouse cursor may also be observed in OneNote and other Microsoft 365 applications, but that classic Outlook is affected the most.

Microsoft is investigating a known issue that causes the mouse pointer to disappear in the classic Outlook desktop email client for some users.

I finally figured out what is causing the disappearing cursor in Firefox.<BR><BR>While I will be reporting this to Infopop so they can fix it, those wanting to fix it ...

Microsoft is investigating a persistent mouse cursor bug affecting its classic Outlook desktop app, with temporary workarounds available..