Preparing for an Exchange Server 2010 Public Folder Migration to Exchange Server 2013, 2016, or O365

Want to migrate to Modern Public Folders on Exchange Server 2013, 2016, or Exchange Online (O365)? Start preparing now. I have created the list below of areas to fix, based on my numerous Exchange Server 2010 PF migrations. Fixing all the errors below will lower the amount of PF migration redos/reruns. You will have at least one rerun/redo (due to errors) for your PF migration - so plan on it. Lets first start with the Public Folder Migration Steps:

 
Migrate public folders from Exchange 2010 to Exchange 2016
https://technet.microsoft.com/en-us/library/mt463355(v=exchg.150).aspx

Migration to Modern Public Folders – Notes from the Field
https://blogs.technet.microsoft.com/exchange/2016/10/10/migration-to-modern-public-folders-notes-from-the-field/

Use batch migration to migrate legacy public folders to Office 365 and Exchange Online
https://docs.microsoft.com/en-us/exchange/collaboration-exo/public-folders/batch-migration-of-legacy-public-folders
 
Now, let's dive into preparing your Exchange Server 2010 Public Folders for migration to Modern Public Folders.

STEP 1:

Verify public folder replication

Exchange 2010 Public Folder Replication Report V2 (updated)
https://gallery.technet.microsoft.com/Exchange-2010-Public-66d3939e

.Get-PublicFolderReplicationReportV2.ps1 -AsHTML -FileName C:PFReplReport.html

Step 2:

Fix anything yellow when you run:

Get-MailPublicFolder -Resultsize Unlimited

Fix Aliases:

New version of fix-alias.ps1

https://johanveldhuis.nl/nieuwe-versie-van-fix-alias-ps1/

STEP 3:

Clean up names too…

Forward slash or backslash:

Get-PublicFolderStatistics -ResultSize Unlimited | Where {($_.Name -like "**") -or ($_.Name -like "*/*") } | Format-List Name, FolderPath

https://technet.microsoft.com/en-us/library/dn912663(v=exchg.160).aspx#Anchor_2https://technet.microsoft.com/en-us/library/dn912663(v=exchg.160).aspx

STEP 4:

Removing Unresolved SIDs in Exchange 2010

https://blogs.technet.microsoft.com/bill_long/2011/10/23/removing-unresolved-sids-in-exchange-2010/