The following error may occur when updating the hybrid configuration on an Exchange 2013 server…
Subtask CheckPrereqs execution failed: Check Tenant Prerequisites Deserialization fails due to one SerializationException: ...
As it turns out, the error exists in both Exchange 2013 Service Pack 1 (SP1/CU4) and Cumulative Update 5 (CU5), but is resolved with Exchange 2013 CU6.
Related Articles:
Reference(s):
Reblogged this on Microsoft Exchange for IT Professionals.