Ondrej Žilinec – IT Blog

Problem: When I do migration from Exchange 2010 to Exchange 2016 most of the time I have problem with old style Public Folders hosted on Exchange 2010. When you migrate user from Exchange 2010 to Exchange 2016 she cannot access Public Folders hosted on Exchange 2010.

Solution: You need to setup Exchange 2016 environment to be able to proxy Public Folders hosted on Exchange 2010. You need to create proxy mailbox which Exchange 2016 will use to proxy Public folders. Here are couple steps you need to do:

• Create new mailbox:

New-Mailbox -Name PFMBX1 -Database {YOUR  EX2010 DATABASE NAME}

• I preffer to hide this mailbox from other users

Set-Mailbox -Identity PFMBX1 -HiddenFromAddressListsEnabled $true

• Set on Exchange 2016 server following proxying

Set-OrganizationConfig -PublicFoldersEnabled Remote -RemotePublicFolderMailboxes PFMBX1

Now when Exchange 2016 users restart their Outlook clients they will see Public folders hosted on Exchange 2010.

Have a nice day,

Problem: There is a known error in Exchange 2013/2016 when you migrate user’s mailbox. After the migration is done use cannot access her new mailbox. It is possible after some time (max 15 minutes).

Cause: This is caused by outdated data cached by Autodiscover process on Exchange server. It’s called MSExchangeAutodiscoverAppPool.

Solution: You need to set application pool responsible for creation autodiscover XML file to recycle more often. You can do Recycle manually from IIS console after migration is done:

Or you can configure automatic recycling on specific condition. I most of the time configure Recycling on every minute. When all users are migrated I disable this rule:

Have a nice day,