Can't see todoist in my Outlook Tasks section
I've checked to make sure the add-in is properly installed and I can see the add-in is active in the Trust Center, but I somehow lost it from the Tasks page in Outlook and can't get it back.
once you're in the Trust Center, please use the "Go" button next to the COM- Add-ins drop down menu and you should see a list of your plugins with check boxes next to them. If the Todoist plugin is not checked - check it. If it is checked, try to un-check it, save the changes and then go to the add-ins list again and check it back.
Also, you should see a Todoist button/checkbox in the add-ins toolbar which should show the plugin pane.
If none of this helps, please tell me - which version of Outlook and what operating system are you using?