Error message when you move user from local server to cloud server

[MLS noob]

Sorry but im NOOB for this.

We have a customer, which unable to complete the movement of user from their local server going to cloud server and they have this logs:


19/06/2018 4:10:57 AM [xxxxxxxxxxx] Transient error SourceMailboxAlreadyBeingMovedTransientException has occurred. The system will retry (8/1360).
19/06/2018 4:11:28 AM [xxxxxxxxxxx] The Microsoft Exchange Mailbox Replication service 'xxxxxx.xxxprd01.prod.outlook.com' (xx.xx.xxx.xx ServerCaps:FFFFFF, ProxyCaps:0FFFC7FD6DFDBF5FFFFFCB07FFFF, MailboxCaps:, legacyCaps:FFFFFF) is examining the request.
19/06/2018 4:11:28 AM [xxxxxxxxxxx] Connected to target mailbox 'xxxxxxxxxxxxxxxx.onmicrosoft.com\54842cea-823b-4111-9962-62d1bcd3d19f (Primary)', database 'xxxxxxxxxxxxx-db059', Mailbox server 'xxxxxxxxxxx.xxxprd01.prod.outlook.com' Version 15.20 (Build 863.0).
19/06/2018 4:11:29 AM [xxxxxxxxxxx] Connected to source mailbox 'xxxxxxxxxxx.onmicrosoft.com\54842cea-823b-4111-9962-62d1bcd3d19f (Primary)', database 'STAGE', Mailbox server 'xxxxxx.xxx.local' Version 15.0 (Build 1293.0), proxy server 'xxxxx.xxx.local' xx.xx.xxxx.x ServerCaps:, ProxyCaps:, MailboxCaps:, legacyCaps:0400001F7FFFFFCB07FFFF.
19/06/2018 4:11:29 AM [xxxxxxxxxxx] Transient error SourceMailboxAlreadyBeingMovedTransientException has occurred. The system will retry (9/1360).
19/06/2018 4:11:59 AM [xxxxxxxxxxx] The Microsoft Exchange Mailbox Replication service 'xxxxxxxxxxxxxxx.xxxprd01.prod.outlook.com' (xx.xx.xxx.xx ServerCaps:FFFFFF, ProxyCaps:0FFFC7FD6DFDBF5FFFFFCB07FFFF, MailboxCaps:, legacyCaps:FFFFFF) is examining the request.



Could someone explain what is this logs? Thanks a lot mate!