Hi,
Doing a cutover migration from onpremise exchange 2010 to Office365. Followed the instructions here http://help.outlook.com/en-us/140/ms.exch.ecp.emailmigrationwizardexchangelearnmore.aspx
Unfortuantely I am getting the following error:
Failed to update the on-premises mailbox with the target address (SMTP:****@******.onmicrosoft.com). The mail sent to the user will not reach user's hosted mailbox. The error might be due to account credentials used for migration not having enough permission to write data back into the on-premise AD. Please ensure that the account credential has Domain Admin privilege.
I've assigned the Administrator in AD and the Exchange machine full access to the mailboxes as per the guide
Does anyone have an exact list of all the permissions needed and what else I can do to resolve this issue?
I read also that MSOL_AD_Sync also needs access to Organisation Management.
Thanks,
Greg.