Hi,
Last week we had an issue where when we were upgrading Exchange 2010 schema and preparead. Default accepted domain got changed as there was no email address policy with the existing default accepted domains. This we came to know when fax system started failing the fax due to change in the default accepted domain. After checking the setup.log file we came to know while upgrading to Exchange 2010 setup tried to look for email address policy associated with the default accepted domain as there was no email address policy for the default accepted domain exchange setup changed the default accepted domain to the domain with the wild card entry email address policy...
Has anyone seem this issue....