Looking for help on this one. We have been trying to setup the sync from our on-prem Exchange to O365 for the past two weeks. We are getting a lot of crazy issues, but one that we have not been able to work through is the following (see below). This is only happening for a small handful of mailboxes. Many of the boxes are syncing with no problem, but we have approx 10 or so that are throwing this error. We have removed the account on o365 and let them rebuild and still no luck. Any ideas of the cause of this?
Data migrated: 0 B (0 bytes)
Migration rate: 0 B (0 bytes)
Error: MigrationPermanentException: Error: MapiExceptionNetworkError: Unable to make connection to the server. (hr=0x80004005, ec=2423)Diagnostic context: Lid: 49064 dwParam: 0x3 Lid: 59431 EMSMDB.EcDoConnectEx called [length=147] Lid: 51239 EMSMDB.EcDoConnectEx exception [rpc_status=0x6BA][latency=23337] Lid: 62184 Lid: 16280 dwParam: 0x0 Msg: EEInfo: ComputerName: n/a Lid: 8600 dwParam: 0x0 Msg: EEInfo: ProcessID: 30912 Lid: 12696 dwParam: 0x0 Msg: EEInfo: Generation Time: 5/23/0413 6:26:45 PM Lid: 10648 dwParam: 0x0 Msg: EEInfo: Generating component: 13 Lid: 14744 dwParam: 0x0 Msg: EEInfo: Status: 1722 Lid: 9624 dwParam: 0x0 Msg: EEInfo: Detection location: 1352 Lid: 13720 dwParam: 0x0 Msg: EEInfo: Flags: 0 Lid: 11672 dwParam: 0x0 Msg: EEInfo: NumberOfParameters: 1 Lid: 12952 dwParam: 0x0 Msg: EEInfo: prm[0]: Long val: 3221360650 Lid: 62184 Lid: 16280 dwParam: 0x0 Msg: EEInfo: ComputerName: n/a Lid: 8600 dwParam: 0x0 Msg: EEInfo: ProcessID: 30912 Lid: 12696 dwParam: 0x0 Msg: EEInfo: Generation Time: 5/23/0413 6:26:45 PM Lid: 10648 dwParam: 0x0 Msg: EEInfo: Generating component: 14 Lid: 14744 dwParam: 0x0 Msg: EEInfo: Status: -1073606646 Lid: 9624 dwParam: 0x0 Msg: EEInfo: Detection location: 1380 Lid: 13720 dwParam: 0x0 Msg: EEInfo: Flags: 0 Lid: 11672 dwParam: 0x0 Msg: EEInfo: NumberOfParameters: 2 Lid: 12952 dwParam: 0x0 Msg: EEInfo: prm[0]: Long val: 12002 Lid: 8856 dwParam: 0x0 Msg: EEInfo: prm[1]: Unicode string: /rpc/rpcproxy.dll?MYSERVERNAME:6001 Lid: 59505 StoreEc: 0x977 Lid: 50544 ClientVersion: 15.0.698.5 Lid: 52080 StoreEc: 0x977 Lid: 51152 Lid: 52465 StoreEc: 0x977 Lid: 60065 Lid: 33777 StoreEc: 0x977 Lid: 59805 Lid: 52487 StoreEc: 0x977 Lid: 19778 Lid: 27970 StoreEc: 0x977 Lid: 17730 Lid: 25922 StoreEc: 0x977