Sometimes it happens that after a reinstallation of the Outlook Add-in, the actual toolbar does not appear in Outlook. The toolbar can however be seen as a separate toolbar under View / Toolbars. The actual cause is that previous Outlook Add-ins were still active previous to the reinstallation.
To resolve the issue, do the following:1. within Outlook, select Tools in the menu2. select Trust Center3. select Add-ins4. select Apply macro security settings to installed add-ins5. verify that COM Add-ins is selected6. press Go7. if the Microsoft Dynamics NAV Synchronization Add-in is selected, deselect it8. press OK9. within Outlook, select Tools in the menu10. select Trust Center11. select Add-ins12. select Apply macro security settings to installed add-ins13. verify that COM Add-ins is selected14. press Go15. select the Microsoft Dynamics NAV Synchronization Add-in is selected16. press OK
The Outlook Add-in toolbar should now be visible again.