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Hi,
I have migrate public fodders to O365.
Problem that I have is with mail enabled public folders.
My mail flow is from on prem to O365.
I have deleted public folder mailboxes on premise.
Mail enabled Public folder “Mailbox“ objects still exist on premise and pointing to deleted Public folder mailbox.
Question is how to delete those object and not brake mail-flow from on prem to Cloud mail enabled public folders ?
I was unable to find documentation, what to do after all public folders are migrated to O365. And you do not nee public folder mailboxes on perm?
Thank you.
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Is your on-premises Exchange hybrid configured with O365?
Can messages sent to public folders in Exchange Online be delivered successfully?
The official document mentions that we can remove public folder mailboxes from Exchange on-premises environment. However, it doesn't mention that mail-enabled objects for public folder should be deleted as well. For your reference: Remove public folder mailboxes from your Exchange on-premises environment.
If the mail flow for public folders works well, we can keep those objects. It's not suggested to remove the mail-enabled public folder objects from AD directly for your hybrid environment.
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Hi,
If I run on premises Exchange Server Get-MailPublicFolder public folder is under : ContentMailbox : ****/Deleted Objects/***/DEL:c45566bc-2545-4678-f26c-38707e01c123
And when i send an email, you can also see in event log, that object point to deleted object…
I was thinking to set it to $null. But there is no documentation.
Mail flow is working.
I have only few mail public folder mailboxes that they ware not stamp with … ExternalEmailAddress : expf:******
I was thinking to disabled effected mail enabled public fodders that have issue and enabled it again. Delete on premise object and then run Sync-ModernMailPublicFolders.ps1.
Temporary I have add in O365 mail Public folder relay address ****.mail.onmiclrosoft.com and set on premises public folder object ExternalEmailAddress to point to ****.mail.onmiclrosoft.com
Br,
Borut
Actually, I'm a little confused about your description. When we delete the public folder mailbox from on-premises Exchange, we have to mail-disable the public folder firstly. Then we can delete the public folder, and delete the public folder mailbox. So it's strange that you deleted the pf mailbox, but the pf still exists. If I have misunderstood, please point out.
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From your link “Use batch migration to migrate Exchange Server public folders to Exchange Online” , there is not written after completing migration or any part of migration what to do with existing mail enabled public folders. There is only one script “SetMailPublicFolderExternalAddress.ps1 “ that stamps mail on premise mail enabled public folders with external email…
So from start…
Public folders and mail enabled public folders are on prem.
I have migrate them all to O365
Mail for “mail enabled public folders” is routed to O365.
What to do with Public folder mailboxes on prem after I have completed migration?
Should I delete AD objects “mail enabled public folders” and run aging “SetMailPublicFolderExternalAddress.ps1” or what. Currently all mail enabled public folders are pointing to “DEL” public folder mailbox.
Did you migrate public folders according to that official document?
Since emails to mail-enabled public folders are correctly routed to Exchange Online, please run the command to indicate that the public folder migration is complete:
Set-OrganizationConfig -PublicFolderMailboxesMigrationComplete:$true -PublicFoldersEnabled Remote
Then you can try to delete one object and test the mail flow. If everything works well, you can delete others. Additionally, we would suggest you make a backup before modifying AD objects.
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Hi LydiaZhou,
Task was done as written in docu and of course PublicFolderMailboxesMigrationComplete == True and PublicFoldersEnabled == Remote
If I remove “mail enabled public folders” object or delete ExternalEmailAddress, mailfow is broken from on prem to O365.
In provided link : “Use batch migration to migrate Exchange Server public folders to Exchange Online” :
• Step 7: Finalize the public folder migration (public folder downtime required) …..At this point, we recommend re-running the following script to ensure that any new mail-enabled public folders are synchronized with Exchange Online:
• Step 9: Finalize the migration on-premises .... In your on-premises environment, run the following script to make sure all emails to mail-enabled public folders are correctly routed to Exchange Online. The script will stamp mail-enabled public folders with an ExternalEmailAddress
So what to do after migration to public folder mailboxes on premises organization and what to do with mail-pf
hi LydiaZhou-MSFT,
As I mentioned above, in general, we have to mail-disable the public folder, then we can delete the public folder, and delete the public folder mailbox. Otherwise, we will get this error:
How did you delete the public folder mailbox without removing the public folder?
Additionally, after you delete the on-premises public folders, mail routing should be to O365 directly.
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This command WILL NOT work, after you complete migration on prem Public Folders Exchange server. You will get an error, there is no public folder (powershell) …. And to give you a hint, you will NOT see NULL, zero, nada public folder in Exchange (2013/2016/2019) GUI after you complete the switch to O365 Public folder.
There is command to delete public folder mailboxes… YES, then mail flow will continue to work, but mail public folder object will point / hosted on DEL: public folder mailbox.
Sorry for ignoring that we have to use Remove-Mailbox to delete the pf mailbox directly after migrating to O365. I test on my on-premises Exchange, it can be reproduced that msExchPublicFolderMailbox points to a deleted object:
This should be normal. Based on my knowledge, the added ExternalEmailAddress works for messages sent to pf in the queue. For new messages sent to pf after the migration, they should be delivered to Exchange Online directly according to MX record. So the mail-enabled pf object won't affect new messages sent to the pf in O365, you can leave the mail-enabled object alone. You also can delete it if you make sure no pf messages in the queue on on-premises Exchange.
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