Using older versions of Outlook for Mac in business environments
This just in: I cannot schedule meetings with a signature at all. At least standard emails are possible to send, even though you get that annoying popup twice first. What happens when I try to send a meeting invitation with my signature is a window saying "Outlook can't save images in this kind of item".
Not only another error in relation with signatures with images in them but a completely braindead error message.
I cannot fathom how this is still an issue that has not even been thoroughly investigated, it affects businesses every day. Please get a grip on this NOW Microsoft. You have plenty of people here giving you their help if needed to track the issue.