Q.) I have a Outlook 2007 client that is hanging during send and receive. Doesn’t error out, just hangs forever. I’ve even tried to make a new OAB and still have the same issue. I even tried deleting the locally cached OAB with no success!

A.) The issue may be the IIS permissions on the OAB default site. Check in IIS and make sure the "Authenticated Users" group is correctly listed. You can tweak the perms so they only have read access!

OAB / Exch 2k7 / IIS issue!