Symptoms
In Microsoft Exchange Server 2019 or Exchange Server 2016, you use the New-MailboxSearch cmdlet to create an In-Place eDiscovery search or an In-Place Hold by setting the InPlaceHoldEnabled parameter to true. All the current property values on the msExchUserHoldPolicies attribute are unexpectedly removed, and then added back if you add a new mailbox search against the same source mailbox.
Resolution
To fix this issue, install one of the following updates:
For Exchange Server 2019, install the Cumulative Update 5 for Exchange Server 2019 or a later cumulative update for Exchange Server 2019.For Exchange Server 2016, install the Cumulative Update 16 for Exchange Server 2016 or a later cumulative update for Exchange Server 2016.
References
Learn about the terminology that Microsoft uses to describe software updates.
