I have set a user account to be excluded from address lists using the on-prem AD attribute msexchHideFromAddressLists, also setting the mailnickname attribute to ensure things get replicated correctly. This is working and I can see that the SharePoint user profile has got SPS-HideFromAddressLists set to true.
This user does now not appear in Delve when searching by the username, which is great.
However, the user does still appear when searching in the SharePoint modern search, under the People tab (/_layouts/15/sharepoint.aspx). My understanding is that this should respect the SPS-HideFromAddressLists property the same way Delve does. There's no way to customise the query as far as I can see.
Is there some additional caching that happens, something else that I need to set, or should the People search be returning the same result as Delve?





