hi,
I thought custom attribute (ms-Exch-Extension-Attribute1 to ms-Exch-Extension-Attribute15) can also be used to display in the outlook contact card, but as far as I have tested they don't appear in outlook contact card.
1. Is it possible to use custom attribute to display in contact card?
2. I cant find any MS article related to this, do you find it?
3. Is it possible to add additional attributes to outlook contact card, apart from the default options such as organization name, contact number, etc? if possible I want them to display in contact card when user download their OAB.