Usage of Profile Custom Attributes (Exchange custom attributes 1-15) in the PNP Search as filter

[msteuper]

Hi all,
we have extended the profile card with values out of the Exchange custom attribute set in Entra ID which are filled via a sync from the local AD. As mentioned, the values are displayed in the profile card, but we would also like to provide a people search in the intranet which should also provide the option to filter via these custom attributes in the PNP search context. Any idea how this can be achieved? Thanks a lot for any hints.