Mar 13 2021 06:26 AM
Mar 13 2021 06:26 AM
Looking for any advice on an issue that I am facing. Currently in process of migrating from Exchange 2010 to Exchange Online and everything has gone relatively well up to this point. I have successfully migrated all user mailboxes (around 950 users) and everything is working as expected. The last step is too migrate Public Folders and I am following the Batch Migration instructions.
I've ran all of the scripts and walked through each step without too much trouble (the only "issue" being the SourceSideValidations.ps1 script took 5 days to run). The problem is that after successfully creating the migration batch and starting it, the job fails right away with the error "MigrationMailboxNotFoundException. The migration mailbox for the organization is either missing or invalid.".
There are 52 public folder mailboxes that were created in the 'Create Public Folder mailboxes in Exchange Online" step (we have a fair amount of data and number of public folders). In the Migration job - it lists all 52 public folder mailboxes and everyone has a failed status with that same error message. Given the error "MigrationMailboxNotFoundException" I am not sure if that is in reference to the public folder mailbox that was created in Exchange Online or if its referring to something wrong with the on-prem side.
The public folder mailboxes that were created in Exchange online seem okay - in that I can see all of them in the admin console and get the details with PowerShell using 'Get-Mailbox -PublicFolder -Identity "Mailbox1" for example. One thing I am not sure of if this is normal, but each public folder mailbox that was created has the correct display name (Mailbox<#>) but its SMTP address is like "Mailbox1_eb1aeb70@<domain>.onmicrosoft.com". I tried deleting the migration job and adding it again with the same results. When looking at the PublicFolder Migration end point that all seems fine.
I ran an Outlook connectivity test and it all passes.
When looking at the Migration report (Get-MigrationBatch -Identity "PublicFolderMigration" -IncludeReport) it doesn't show much useful information:
....migration user 'Mailbox1' created. (one line like this for every public folder mailbox)
...The migration batch processor ActiveMigrationJobProcessor finished with the result 'Working' after 00:00:01.0424004. Processed 0 migration users, which underwent the following transitions:
'StatusValidating -> 52'.
...The migration batch processor ActiveMigrationJobProcessor finished with the result 'Completed' after 00:00:00.0059958. Processed 0 migration users, which underwent the following transitions: ''.
...User 'Mailbox1' failed migration. (one line like this again for each mailbox).
I just have no idea where to start looking to trouble shoot this issue so if anyone has come across the same problem or has any advice on where or what I should be looking at all advice is appreciated.
Mar 15 2021 06:30 AM
Hi @NetSysEngMN ,
If you need to move your public folders to Exchange Online but your on-premises servers aren't running the minimum support versions of Exchange 2010 (minimum SP3 + RU8), Microsoft strongly recommends that you upgrade your on-premises servers and use batch migration, which is the only supported public folder migration method.
Please go through with the below link.
please do like and share this post, if my answer resolved your issue..
Mar 15 2021 07:25 AM
Mar 16 2021 12:57 PM
Mar 16 2021 01:21 PM
Mar 16 2021 01:48 PM
Thank you for your feed back.
I'm exactly in the same situation, same Exchange version SP3 RU32).
The test migration command runs successfully also:
RunspaceId : 9e45203b-0b80-xxxxxxxxx
Result : Success
SupportsCutover : False
TestedEndpoint : mail.xxxxxx.com
IsValid : True
ObjectState : New
All users are migrated to Online and they waiting for public folder migration to uninstall onprem server....
So I will wait for your feedback about the case opened to Microsoft.
If answer is negative, the only option will be to migrate first to Exchange 2013/16 onprem and after to Online...
Mar 18 2021 11:51 PM - edited Mar 19 2021 02:08 AM
seems like I am in the exact same situation... migrated all user/ressource/shared mailboxes successfully.
Did the preparations for the public folders exactly as mentioned in the guides from Microsoft https://docs.microsoft.com/en-us/exchange/collaboration/public-folders/migrate-to-exchange-online?vi... , but once I start the migration job I get this error:
Error: MigrationMailboxNotFoundException: Das Migrationspostfach für die Organisation fehlt oder ist ungültig.
Running Exchange 2016 CU19
Mar 19 2021 01:10 PMSolution
Mar 19 2021 02:28 PM
Mar 20 2021 01:32 AM
My 3 pf mailboxes had an incorrect name. I've remaned them and now they are syncing!
Thank you very much :)
Mar 22 2021 03:01 AM