Recoverable Items folder is growing during a cutover migration

I have one out of 150 mailboxes in a cutover migration, where the Recoverable Items folder has grown to over 2.5 million (4 GB) items - It was 1.5 million early last week.  The migration is effectively waiting on this single mailbox to complete but it seems to be growing so quickly that it may never catch up - but I am not sure as we have migrated 1 million of this mailbox's items to the cloud.

The sheer amount of messages seems to indicate that they aren't valid messages or items that the user is deleting in Outlook.  He has only worked with the company for 2 years - it is highly unlikely that the user had that many messages/items.

Source Exchange is: SBS 2011 SP1
Target: Exchange Online (Office 365)

Thank you in advance.
K BAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Vasil Michev (MVP)Commented:
Well, just in case check the size and number of items on-prem. If you are certain that the migration wizard is messing things up, just stop it and exclude this mailbox. You can always export it manually later.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
K BAuthor Commented:
so I ended up doing this...

Set-Mailbox -Identity aPerson -RecoverableItemsWarningQuota 0GB -RecoverableItemsQuota 0GB -UseDatabaseQuotaDefaults $false

Search-mailbox -identity aPerson -SearchDumpsterOnly -DeleteContent

get-mailbox -Identity "Alan Person" | Start-ManagedFolderAssistant

Get-MailboxfolderStatistics -Identity aPerson | select identity, itemsinfolder | sort itemsinfolder

Open in new window

K BAuthor Commented:
It was the answer in the could help someone.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.