An eDiscovery Case was apparently removed but the in-place holds were never removed. So a user now shows a hold GUID on their mailbox and is prevented from emptying their deleted items once they hit the 100gb max. Since the Case identifier has been removed from the system, the Get-CaseHoldPolicy command using the GUID (minus the prefix) returns an error.
Was on phone with MS support and they are currently at a loss.
There is an attribute in on-prem Active Directory named "msExchUserHoldPolicies" that holds the GUID of the in-place hold. We are in hybrid setup so when I clear this value and run AD Connect sync, the value comes right back. Research shows that there is an attribute named "cloudMsExchUserHoldPolicies" that is the online attribute that apparently AD Connect cannot clear. I have not found a way to clear the value of this cloud attribute...assuming this will even allow the user to be able to reduce the mailbox size and use it.
Was hoping that someone in the interworld had run into this situation before and might have some tips.
I found the script Remove-UserInPlaceHold (discussed https://docs.microsoft.com/en-us/archive/blogs/dsheehan/exchange-lingering-orphaned-in-place-holds-on-mailboxes-blocking-cleanup-moves) and have run it but it hasn't helped.
Thought it worth a try to ask.
Thanks.