I assume you refer to MUC (i.e. 'in the group')?

Inbox is indeed experimental and is not implemented, however we do support XEP-0013: Flexible Offline Message Retrieval (which is in a way similar to Inbox)

Ok, should work for me. Thanks :)

Hi again, @woj-tek, Indeed if I installed a client and connected to server of tigase I installed on my infrastracture - the number of unread documents appears properly. However I am implementing the application in which chat is just a part and I need to obtain the unread count documents in other place too. Could you help me with pointing the right place i documentation so I can understand how to obtain these numbers?

Thanks, Dawid

This highly depends on the (xmpp) library that you use. Specification defines XML stanza that can be used to obtain it here 2.2 Requesting Number of Messages

Hi again,

I tried it out but the server doesn't respond with the number of messages to read. Instead I can find only empty in response.

I can see at point 2.1 of documentation -> https://xmpp.org/extensions/xep-0013.html#discover that requesting for supported feature should provide in response if xep-0013 is supported

But I don't get that in my response.. I checked for your documentation and added below to my configuration

sess-man { amp() { 'store-limit' = 200L } }

But it didn't help. So is there anything else I should specify ? Thanks in advance

Have you enabled the plugin in Session Manager?

sess-man {
    'http://jabber.org/protocol/offline' (active: true) {}
}

Worked for me. Thanks :)