Hi All,
As far as I know, there’s a similar Outlook known issue in the Feb 2018 updates, the symptom is Outlook hangs or freezes when clicking Signature button. For more details about this issue, please check: https://support.office.com/en-us/article/fixes-or-workarounds-for-recent-issues-in-outlook-for-windows-ecf61305-f84f-4e13-bb73-95a214ac1230. Please check whether you have any pre-installed Microsoft Office Desktop apps and remove them. Here’s the work around of this issue: https://support.office.com/en-us/article/outlook-freezes-clicking-the-signature-button-c70b36c2-66ca-401c-ab45-f29a46495d02.
Meanwhile, please check the client updates, it is suggested to always keeping the latest Outlook client.
@Tony Argn, thanks for your sharing.
Regards,
Anna