After a computer reset I wanted to use my VBA Macros for Outlook 2013.
In Outlook I get the error message:
\"An errror occured while attempti
I had this same problem and the solution here fixed it: https://social.technet.microsoft.com/Forums/en-US/07f0158c-085b-4031-93a1-c9d047cf855c/unable-to-sign-outlook-2010-vbaproject?forum=outlook. The thread is long, but the gist of it is you need to manually save your VBA project after signing, and before exiting the VBA editor. Scroll down about 2/3rds of the way to the post by "Diane Poremsky [MVP]".