Using Classic Outlook on Windows for personal email, calendar, and contact management
Nick,
Happy New Year. Although Office did implement a fix previously it caused other issues. In order to properly fix the issue, we had to escalate a hotfix to Windows. Windows has implemented a fix and that I added to this Known Issue, Outlook Desktop is slow to save attachments to a network path - Microsoft Support. I believe the fix is still in Windows 11 canary. Our escalation team asked Windows to backport to Windows 10 and I think that is planned but have not seen a recent update about it.
STATUS: FIXED
Windows implemented a fix that will be first available to Insiders starting with build 25991.1000.rs_prerelease.231102-1335.