Exchange 2007 connection via ODME failed with '400 Bad request' and '403 forbidden' error messages.
On Demand Migration for Email (ODME): 220.127.116.11
Browser: Internet Explorer 11 - English.
Migrating from: Exchange 2007 08.02.0176.002 (SP2) Online.
Migrating to: Office 365.
Internet Security and Acceleration Server (ISA) was setup between Exchange Server and the Internet, but not configured.
IIS logs didn't show any errors.
All the rights as stated in manual have been setup (Enabling Application Impersonation Rights – Page 18) and no auto-discover was setup, as well as Forms authentication was being used.
ODME logs showed the following error messages:
Error creating source session. The request failed. The remote server returned an error: (403) Forbidden.(The remote server returned an error: (403) Forbidden.)
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