I have a single exchange 2007 server. I have 2 sites connected VPN, Office1 and Office2. The exchange server is located in office1(192.168.1) all users in office2 (192.168.0) can't sync the OAB. All users in office1 have no problem. Users in office2can send and receive mail no problem, but outlook 2007 is continuosly trying to sync folders, and cant sync OAB. I have outlook 2007 and 2003 users. Any help will be great, this is time sensitive. Thanks

Hi, Sounds as a network problem. Is there a firwall between the offices? Leif

Thanks for your response. The connection between the 2 offices is VPN and its wide open. When I add the mailbox to the client machine it auto configures in a flash. I have also renamed the OST file and whenthe new OSTsyncs with the mailbox it works reasonably fast. The VPN tunnel is over a T1 connection at both ends. It is the only thing using the T1. Are there any tests you can recommend?

Here is an update. I brought a 2007 office and office xpworkstation to office1, logged on, and all worked fine. After taking them back to office2, only the office xp workstation works. The outlook 2007 workstation does not work. I realize outlook 2007 updates OAB different than previous versions of outlook, could it be a problem with the ip address being 192.168.0 instead of 192.168.1, or an exchange setting that allows acces from another site with different ip scheme. Any help will be great, i am running out of time(boss losing patience)and pulling my last 2 hairs out. Thanks in advance.