System.InvalidCastException when you change passwords in Outlook on the web in Exchange Server 2019 and 2016

Applies to: Exchange Server 2019Exchange Server 2016


Users who are assigned the RBAC role type MyMailboxDelegation are unable to change their passwords through Outlook on the web in Microsoft Exchange Server 2019 or Exchange Server 2016. In addition, an exception is recorded:

Method invocation target threw an exception: System.InvalidCastException: Unable to cast object of type 'Microsoft.Exchange.Data.Directory.ADRawEntry' to type 'Microsoft.Exchange.Data.Directory.ADObject'


To fix this issue, install one of the following updates:


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