I applied Virtual Exchange Organisation on a standalone Exchange 2007 server (On SBS) described here : http://technet.microsoft.com/en-us/exchange/bb936719(EXCHG.80).aspx Every thing went find applying this procedure (Including creating new address lists pour the new organisations) Right now (few weeks after), it's impossible to create new address lists on the server. When I try to create i got an error which says "Address List "\" not found " ; in this configuration \ should be the root contrainer for address list. Here are screen shots : Creating with command line : http://www.simplicit.eu/8917e782bccb1d7c480d349607596688/exchg1.png Creating with Exchange management console : http://www.simplicit.eu/8917e782bccb1d7c480d349607596688/exchg2.png http://www.simplicit.eu/8917e782bccb1d7c480d349607596688/exchg3.png http://www.simplicit.eu/8917e782bccb1d7c480d349607596688/exchg4.png In the ADSI editor, I noticied that there where no more Contrainer "Address List Container" http://www.simplicit.eu/8917e782bccb1d7c480d349607596688/exchg5.png Is there a way to fix this problem and be able to create address lists ? Should I delete the old objet "Address List Container" and create a new one ? Thanks in advance for your help.

Hi, Sorry for the delay response. For this issue, please first delete the old object "Address List Container", then try to run Setup.com /PrepareAD to fix this issue. Additionally, I would like to share the SBS support forum is the below link: SBS 2008 NewsGroup: https://connect.microsoft.com/sbs08/community/discussion/richui/default.aspx?wa=wsignin1.0 Thanks Allen