Can't view Online user free/busy status in Exchange Server 2019 and 2016

Applies to: Exchange Server 2019Exchange Server 2016


Currently, there is no way of differentiating an authorization server based on the domain for which it is created in Microsoft Exchange Server 2019 and Exchange Server 2016. As a result, you can't know if the selected authorization server is correct for the requesting user when building OAuth tokens. This update adds the parameter DomainName to New-AuthServer and Set-AuthServer to handle selection of a correct authorization server from a list of authorization servers present in a single on-premises Exchange organization to a multi-tenant deployment.


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


Learn about the terminology that Microsoft uses to describe software updates.