We have 46,000 contacts that we need imported into a dstribution list. what is the maximum number of members we can have n the DL?

Hi, I am not aware of any hard limits for AD based distribution groups. If you are considering an Outlook based list then there are limits for those which are quite small. You may need to considerdelivery restrication settings - http://exchangepedia.com/2007/08/distribution-groups-and-maximum-recipients-per-message.html and distribution group expansion - http://support.microsoft.com/kb/839949 http://support.microsoft.com/kb/238569Sean Massey | Consultant, iUNITE Feel free to contact me through My Blog, Twitter or Hire Me. Please click the Mark as Answer or Vote As Helpful button if a post solves your problem or is helpful!