In the rare instance of a Mail Express error, you may you need to turn off the Mail Express Outlook Add-In or turn it back on.
To turn on or off the Mail Express Outlook Add-In
In Outlook 2010 or later:
Click File > Options.
In the left pane, click Add-Ins.
In the Manage box, click COM Add-Ins, then click Go. The COM Add-Ins dialog box appears.
Select (turn on) or clear (turn off) the Mail Express Outlook Add-In check box, then click OK.
Take note of the state of the Add-In in the Trust Center (i.e. Active, Inactive, or Disabled). If the Add-In is in a disabled state, it cannot be enabled using the steps above initially. Instead, you must perform the following steps in the Trust Center:
Next to the Manage box, click Disabled Items, then click Go.
In the Disabled Items dialog box, click Mail Express Outlook Add-In, then click Enable.
Close the Disabled Items dialog box.
If the Add-In now appears in the Active list, it is enabled. If the Add-In appears in the Inactive list, follow steps 3-4 above.
In Outlook 2007:
Click Tools > Trust Center.
In the left pane, click Add-Ins.
In the Manage box, click COM Add-Ins, then click Go. The COM Add-Ins dialog box appears.
Select (turn on) or clear (turn off) the Mail Express Outlook Add-In check box, then click OK.
Take note of the state of the Add-In in the Trust Center (i.e. Active, Inactive, or Disabled). If the Add-In is in a disabled state, it cannot be enabled using the steps above initially. Instead, you must perform the following steps in the Trust Center:
Next to the Manage box, click Disabled Items, then click Go.
In the Disabled Items dialog box, click Mail Express Outlook Add-In, then click Enable.
Close the Disabled Items dialog box.
If the Add-In now appears in the Active list, it is enabled. If the Add-In appears in the Inactive list, follow steps 3-4 above.