Run the following command and then restart Outlook:

defaults write com.microsoft.Outlook DisableSyncSliderForSharedMailbox -bool true To revert:

Disablesyncsliderforsharedmailbox | OFFICIAL • 2026 |

Run the following command and then restart Outlook:

defaults write com.microsoft.Outlook DisableSyncSliderForSharedMailbox -bool true To revert: disablesyncsliderforsharedmailbox

Verified by MonsterInsights