How to fix missing add-in in Outlook 2016, 2013 or 2010

Please follow the steps below to troubleshoot and fix a missing Outlook add-in.




If you have any questions about these instructions do not hesitate to contact us. Please include the following information:
  1. Version of Outlook you are using.
  2. Name and version of the add-in.
  3. Right after restarting Outlook, under which section of Outlook's Add-ins window is the add-in listed - Active, Inactive or Disabled (see instructions below).
  4. Any other details that you think are relevant.

Determine if the Add-in is Inactive or Disabled

  • Click on the File tab in the upper-left corner of the main Outlook window.
    Click Ribbon File Tab
  • Click Options.
    Click Options
  • Click Add-ins in the left column of the next window.
    Click Add-ins
  • The list of add-ins is separated into three sections - ActiveInactive and Disabled.
    The exact steps you need to take are different, based on the section in which the add-in is listed. Please carefully follow the instructions below.




Enable Inactive Add-in

  1. If the add-in is listed under Inactive, make sure "COM Add-ins" is selected in the "Manage" drop-down and click "Go...".
    Click Go
  2. Check the checkbox next to the Add-in and click "OK".
  3. Restart Outlook. Close Outlook, wait for 5 seconds, then start it again.

Enable Disabled Add-in

  1. Select Disabled Items in the drop-down at the bottom of this window, next to the Go button.
    Select Disabled Items
  2. Click Go.
    Click Go
  3. Select the Add-in which you would like to re-enable.
    Select the Add-in to re-enable
  4. Click Enable in the lower-left corner of this window.
    Click Enable
  5. Restart Outlook. Close Outlook, wait for 5 seconds, then start it again.
Note: If an add-in is getting disabled frequently, it is likely that your Outlook data file (PST or OST) is getting corrupted. It is a very common Outlook issue. Please see the first two sections of this article for a solution. IMPORTANT: you have to run scanpst repeatedly on every PST file, until it tells you that there are no more errors in the file.