Forum Discussion

Bronze Contributor

Apr 16, 2020

Teams chat retention / deletion inconsistent when mailboxes are on-premises

I have a ticket open with Microsoft about this, so just posting here for comment from others. Scenario: Customer has all user mailboxes in on-premises Exchange, hybrid is not configured. ...

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microsoft teams

Rob Ellis

Bronze Contributor

May 21, 2020

We are still seeing inconsistent cleanup - we have a ticket open with support, and they have raised a Design Change Request (DCR) to the Exchange product group.

oldschoola410

Copper Contributor

Jul 28, 2020

Rob Ellis we are having the exact same issue. We have a hybrid server configured(2019) as well as a adconnect server. But none of the teams messages are being deleted.

Rob Ellis
Bronze Contributor
Jul 30, 2020
oldschoola410

To close this one down, from my perspective at least - some more info:

MS confirmed that in our scenario, these cloud mailboxes (referred to as 'Componentshared only' mailboxes by them) are not processed by MRM / MFA - they are processed by a different job, called ComplianceJobAssistant.

The ComplianceJobAssistant does not have the 10MB limit like the MRM / MFA does - so the amount of chat messages is not relevant.

They think that it was simply the case that when we enabled the retention / deletion policy, it took multiple runs of the ComplianceJobAssistant before it had completely got up to date on all the relevant mailboxes, because in some cases it would have needed to clear down months of older messages.

We've had various users check, and we have had no further reports of any issues, so we expect everything to be fine from now onwards, because all the jobs have caught up, and are now in a steady state of operation.