Unfortunately using Teams brings a list of pre-requisites not easy to fulfill to all the customers (specially those with an On-prem configuration)
From the ZFP manual:
This feature requires the site to have the following:
Subscription to Microsoft 365 and Microsoft Teams.
Access to Microsoft Azure Active Directory portal. This includes the privilege to create security groups in Azure Active Directory and to assign roles to these groups.
Privilege to create an Azure Bot Service. This includes having an expert understanding of the registration of the Bot Service, user role assignment, and Azure Bot registration in Microsoft Azure Active Directory.
Privilege to create channels in Teams, access privilege to those channels, and managing the roles for the Bot application.
ZFP installed with a CA-signed certificate (a self-signed certificate should not be used). Note down the FQDN for the certificate.
An alternative that have more or less all the Teams features (including API integration) that have a flavor that permit a full on-prem installation.
The product is called “output messenger” (Office Chat Software, Team chat software - Output Messenger). Unfortunately their website is not reachable from GE network (like all the other messaging site)
But to summarize the features, here we are:
Instant messages 1-to-1
Group chat
Chat rooms (that can be equivalent to Teams Channels) special chat with a pre-determined topic (i.e. brain lesion) where single users can be invited. Like in Teams channels when a user log in is able to view the full story
Mobile app
Multi-platform clients (Compatible for usage in Windows, Linux, Mac, Android, iPhone, iPad. Web browser)
Video calls
Remote Desktop sharing
File sharing 1-to-1
Output drive (public available)
Calendar with meetings and reminder
Internal mailing
Off the records (encrypted messages that are deleted once logged off)
Broadcast announcements
On-premise server to keep sensitive business data close to the source.
Works within Office LAN / WAN / VPN, Multiple Sub networks, Terminal Service and Internet.
SSL/TLS enabled secure & encrypted messages, suitable for banking and government sectors.
Only authenticated users can connect with your Office messenger network.
Centralized Chat Log Storage with Advanced Search & Filters
Also pricewise looks quite competitive
