We have a send connector with authentication turned on to another exchange org within our company. We can send email to users in this exchange org just fine but when calendar requests are sent, the sender gets a bounce back with the message that they are not authorized to send to the recipient. The generating server is the remote org and this seems to go both ways (calendar requests sent to domainA from domainB get rejected and vice-versa). We are completely stumped as to why email goes fine but calendar requests do not. Both servers are Exchange 2007. And I don't have this issue with any of my 13 other Exchange orgs.

Hi, What's the version of your exchange server? This is a known issue in Exchange 2007 SP1. The latest version of exchange 2007 is service pack 3. Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Thanks Gen Lin-MSFT

Hi, Any update? Gen Lin TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Thanks Gen Lin-MSFT