When Outlook returns an expired sign-in, the add-in now signs you in again using your existing Microsoft session instead of asking for your password every time.

Fixed a sign-in loop where Outlook kept returning an expired sign-in and the add-in gave up with error MM-10. It now signs you in again instead of stopping.

Fixed intermittent error 5100 ("wait until the previous call has completed") while the add-in checks the email format. Calls are now serialized and retried.