Member added to Group List 3 days to late

[MorpheusWin2K]

I have serveral groups setup within exchange that people receive mail through. An idividual was added to a group 3 days after the email started to flow. How would I retrieve the emails this person didn't receive due to being added to late?

Example, we just put her in the group today, Oct. 11, 2004, however, emails have been arriving since Oct. 8, 2004. How can she get these emails?

Thanks