I have Successfully installed the Exchange 2013 in environment that already have 2007 Exchange. Both Exchange Servers are on Domain Controller as we have less resources.
After Installation I saw in IIS "Default WebSite" with 80 and 443 Ports, and "Exchange Back End" Web with 81 & 444 Ports.
I migrated 2 test Mailboxes from 2007 to 2013 Successfully,
But When i open OWA with Default 80 port the Mailbox not login successfully and through and
Exception type: Microsoft.Exchange.Clients.Owa2.Server.Core.OwaADObjectNotFoundException
When I Open OWA with Port 81, it logins Successfully.
All the Clients use Default Port 80 to access OWA and Other Exchange Services.
How to Solve this Issue?