Cause:

The following error may occur if the Webex Webex Desktop App add-in for Outlook 2013 takes too long to load:

When an add-in takes too long to boot, Outlook will disable the add-in automatically.

To enable the Webex Desktop App add-in:

1. Click on 'View Disabled Add-ins...'.
2. Click on Always enable this add-in'.

This will always allow the add-in to run no matter how much time it requires during Outlook start up.

If you have closed the error message, follow the steps below to resolve the issue:

Method 1 - If the Webex Add-In is Disabled:

1. Open Outlook, click the File tab, then choose Options.
2. Click the Add-Ins button.
3. In the Manage drop-down menu, choose Disabled Items, then click Go....
4. Highlight the entry for Webex Desktop App, then click the Enable button.
5. Click OK.
6. Close and restart Outlook.

Method 2 - If the Webex Add-In is Enabled:

1. Open Outlook, click the File tab, then choose Options.
2. Click on Customize Ribbon.
3. Under Main Tabs on the right side of the options window, expand the Appointments section.
4. If Appointments is unchecked, check it. If it is checked, uncheck and recheck it.
5. Click OK.
6. Close and restart Outlook.

Once Outlook has restarted, the Webex toolbar should be visible.

If the issue persists, contact Webex Technical Support, see: WBX162 - How Do I Contact Webex Customer Services or Technical Support?