To resolve this issue you need to edit your policy in Active Directory using ADSIEdit tool and delete disabledGatewayProxy entries of MS and CCMAIL
- Add ADSIEdit snap-in to MMC console (Support Tools must be installed in order to be able to add ADSIEdit)
- Connect to Configuration Naming Context
- Browse to Services --> Microsoft Exchange --> YOURORGANIZATON --> Recipient Policies
- On the right click Properties of Default Policy
- Click Show only objects with entries
- Find disabledGatewayProxy
- Edit its content
- Remove:
- MS:ORGANIZATIONNAME/ORGANIZATIONNAME
- CCMAIL: at ORGANIZATIONNAME
- Repeat this step for all the policies in your organization that include these two entries