EBF Contacts is an application for iOS, iPadOS and Android which connects to your enterprise address-book (Exchange Server). The app stores contact data locally and synchronizes that regularly (One-Way Server -> Client). The data is being used to offer a Caller-ID service and show relevant information about members of the organization.
All contact data can be browsed in the app, which makes it possible to search for members and have contact information about them.
EBF Contacts App has the capabilities to connect to both Exchange On-Premise (2016 and above) or Exchange Cloud (O365). Other data sources are HubSpot and a general CSV/JSON import.