icewarp to Office 365 IMAP Migration issue

Question

Hi Team,

I am in process of migrating from Icewarp to Office 365 through IMAP migration.
For few mailboxes i receive the below error message and the basic troubleshooting like recreating batch, setting bad item limit doesn't fix. Please help.
]1

4/8/2021 6:32:25 AM [MAXPR0101MB1596] Transient error RemoteNetworkErrorTransientException has occurred. The system will retry (53/60, 54/600).
4/8/2021 6:33:33 AM [MAXPR0101MB1596] The Microsoft Exchange Mailbox Replication service 'MAXPR0101MB1596.INDPRD01.PROD.OUTLOOK.COM' (15.20.3999.32 ServerCaps:0FFFFFFF, ProxyCaps:03FFFFFFFFFFC7DD2DFDBF5FFFFFCB07EFFF, MailboxCaps:, legacyCaps:0FFFFFFF) is examining the request.
4/8/2021 6:33:33 AM [MAXPR0101MB1596] Connected to target mailbox 'domain.onmicrosoft.com\6c397284-a617-4963-b468-fe44b7964287 (Primary)', database 'INDPR01DG100-db045', Mailbox server 'MAXPR0101MB1596.INDPRD01.PROD.OUTLOOK.COM' Version 15.20 (Build 3999.0).
4/8/2021 6:33:33 AM [MAXPR0101MB1596] Replay sync state for request 3d85ef02-4145-47c1-b29c-e200e7c5e85e is null.
4/8/2021 6:33:34 AM [MAXPR0101MB1596] Connected to source mailbox 'REDACTED-c53cc23bab84632147a01d3455ad5b14@keyman .com (IMAP)', database '', Mailbox server 'domain.icewarpcloud.in:993 (None)' Version 0.0 (Build 22.0), proxy server 'MAXPR0101MB1596.INDPRD01.PROD.OUTLOOK.COM' 15.20.3999.32 ServerCaps:0FFFFFFF, ProxyCaps:03FFFFFFFFFFC7DD2DFDBF5FFFFFCB07EFFF, MailboxCaps:, legacyCaps:03FFFFFFFFFFC7DD2DFDBF5FFFFFCB07EFFF.
4/8/2021 6:33:34 AM [MAXPR0101MB1596] Request processing started.

Answer 1

@Sabarish Natarajan

We can follow this blog to try to find more detailed information about this migration request: Troubleshooting IMAP Migrations to Office 365

Since this phenomenon doesn't occur on all mailboxes, I think your configuration is correct, this phenomenon may caused by mailboxes itself or network. You can try to remove exist migration request, wait a while and try again. If you still cannot migrate mailbox successfully. You can create new mailbox on Office 365 for those mailboxes, then export and import data from Outlook client.

---

If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Answer 2

hi , i want to ask you did you use RecoveryTools IceWarp Migrator utility or you do imap migration directly from exchange online admin portal ???? , your fast response is highly appreciated , thank you .