Cutover Migration - Duplicate Emails

Question

Hi, I have been having some issues with a cutover migration which have been going on for a few weeks. Everything was looking good for the cutover migration to take place and I was then hit with the 'Stuck in Provisioning' bug. Once this was finally resolved I have been going from one problem to the next. In the end we decided to do a complete reset of the migration so deleted all mailboxes, groups, user accounts, etc. and started a new migration batch. This completes ok but it seems that some emails that are being processed by users whilst the initial sync is happening are not being handled properly by the migration process. I have emails that exist in the inbox, as well as any subfolder they were moved to, or a copy in deleted items if they had been deleted. This is happening even after multiple incremental syncs have taken place. I have been dealing with Microsoft support for the last few weeks and they will not escalate my problem to the product engineers and just say it is something I have to put up with. I have actually done a complete reset twice over the last few weeks to try and sort various problems. Does anyone have any ideas as to how to solve this problem?

Thank you.

Answer 1

Hi, thank you for keeping an eye on this but your people did not solve it. As I mentioned before they refused to do anymore to solve the problem with duplicate emails. I "solved" the problem by recreating the migration batch (for the 5th time) so that it ran at a time when minimal people would be interacting with the mailbox. I am not sure what information you are reading in the SR but it doesn't seem to match up to with what actually has happened over the past month. It has been a long drawn out process but the cutover migration has finally completed now.

Thanks again

Answer 2

Hi Pc_Eq,

I noticed that the SR was closed. After our engineers from the server side solved this incident and recreated the migration job. Everything seems to work fine. If you still have any issues or concerns about it, please feel free to reply the SR emails or let us know.

Best Regards,

Erick

Answer 3

Hi Pc_Eq,

First, I want to collect the Service Request number to see the details of the case. Please go to your details > Private messages on the upper right corner in the forum to reply to my PM.

To narrow down the cause, I want to know:

1. Does the issue occur to all users and all messages?
2. Have users set up the mailboxes on PCs or mobile devices?
3. If they only use Outlook Web App to access the O365 mailbox, will the issue occur?

Thanks,

Henry Huang