According to this, I know that pinnable task panes are only available for Windows and Outlook Online. Is there any kind of workaround for pinnable task panes on OS X? If I modify the manifest to include pinning, Outlook for Mac sporadically crashes with bug messages like:
Exception: EXC_BAD_ACCESS
Exception Code: KERN_NAME_EXISTS (0x00007f86cd511698)
I assume this is because some objects are zombies when a pinned email message is changed. Is there any hope besides waiting for Microsoft to support pinning on OS X add-ins?
Now the documentation is updated and Outlook for Mac supports pinnable task pane starting from 16.13.503 version.