Event ID - 264

Event Id264
SourceMSExchangeDSImp
DescriptionThe Attribute ADC-Global-Name is unknown.
Event InformationThe Move Server Wizard stops working with the following error message: 
One or more errors were encountered while importing objects into the directory. Please see the Application Event Log for details.
Microsoft Exchange Move Server Wizard
Id no: c103757c 
CAUSE:
ADC-Global-Name is a new attribute added to the Exchange Server 5.5 schema in Service Pack 3 (SP3). Versions of the Mover Server Wizard from previous service packs do not recognize this attribute and cannot import the schema properly. 
RESOLUTION:
Install the latest version of the Move Server Wizard. It is located in the Server\40bit\Eng\Server\Support\Movesrvr folder on the Exchange Server 5.5 SP3 CD.
Reference Links Move Server Wizard Stops Working, Event ID 264

Catch threats immediately

We work side-by-side with you to rapidly detect cyberthreats
and thwart attacks before they cause damage.

See what we caught

Did this information help you to resolve the problem?

Yes: My problem was resolved.
No: The information was not helpful / Partially helpful.