When I start the Outlook addin, I can't click this taskpane(?) unless I open an email and then it's not disabled anymore.
Which part of the manifest file should I change to change this behavior? I want it's not disabled even when the user doesn't open/select any email. Because when I change the selected item, it will refresh the page (and I don't want it either).
Thanks!
I tried to change the manifest file from the official site but since I don't quite understand, maybe I misconfigured in some places. I expected this button not disabled even when the user doesn't open/select any email. Because when I change the selected item, it will refresh the page.
Outlook web add-ins are run under the context of currently selected or opened item in Outlook. Only COM add-ins can be run all the time. The lifetime of mail add-ins is quite different - they are loaded only when item is selected or opened in an inspector window.
When I start the Outlook addin, I can't click this taskpane(?) unless I open an email and then it's not disabled anymore.
Ribbon buttons are visible/enabled only for items selected or opened for reasons stated earlier. That is by design. But as a possible workaround you may consider using the events based activation, see Configure your Outlook add-in for event-based activation for more information.
You can post or vote for an existing feature request on Tech Community where they are considered when the Office dev team goes through the planning process.
