Hi,
We have Exchange Servers in India, US and Sweden connected using Hub and Spoke Topology.
US and Sweden is connected through Mumbai Server. There is no direct connectivity between US and Sweden.
The Exchange Server version is as below:
Mumbai - Exchange 2007
US - Exchange 2007
Sweden - Exchange 2010
When Sweden user is sending mail to user in US, the mail bounces. The same is with US user when they send mails to Sweden user.
However, if Sweden user is sending mail to Mumbai users & US user is sending mail to Mumbai users and Vice versa, there is no problem with mail flow.
Need your help in resolving this issue.
Regards,
Joel D'Souza