When I run an eDiscovery search from my 2013 hybrid server I get the following error...
Errors:
Export failed with error type: 'FailedToSearchMailboxes'. Details: The underlying connection was closed: An unexpected error occurred on a receive. Endpoint: Exchange2013.domain.local:444/.../Exchange.asmx HttpContext:
X-AnchorMailbox:it-cchiuu@domain.org
client-request-id:7b686379-6303-4ecb-b381-e1317400c88f
ScenarioData: Exchange\15.00.1178.000\EDiscovery\EWS\S=ES&R=0&BI=635948831259611277&QL=92&SID=91a12ff0-d750-4ef3-9873-e8f0519fef90&RT=635948831259611277
I have contacted Microsoft O365 support, and they advised that the problem is with my on-prem environment and has nothing to do with O365 or the cloud mailboxes.
If I perform an eDiscovery search from on-prem and choose < 10 specific mailboxes (either on-prem and/or cloud mailboxes), the search runs successfully.
But, if I go beyond the 10 mailboxes or choose "Search all mailboxes", I get the above error.
I am at a loss... Any help would be appreciated.
Thanks.
Curtis