Outlook 2010 Work Offline Button Missing

Outlook 2010 should have a Work Offline button on the Send / Receive tab, but this is missing. To get the Work Offline button back:

1. Open Outlook 2010
2. Right click anywhere on the ribbon
3. Click Customize the Ribbon…
4. Click New Tab
5. Select Work Offline from the left hand side list
6. Click Add
7. Click OK

The Work Offline button will still be missing from the Send / Receive tab, but you will now have a new tab (called New Tab, unless you renamed it) that has a Work Offline button.

❗ Addendum: The Work Offline button can also be missing if Outlook is not set to Cached Mode. If cached mode is already on, you may need to recreate your Outlook profile.