Please check if the feature has not already been requested.
If not, please describe it

Refilling of cartridges for printers.
Please add the ability to send printer cartridges for refueling. This capability is required for monitoring and managing cartridges in many organizations located in the Russian Federation.

Remote Monitering and Management Integration (Tactical RMM)
At the moment, GLpi does not have an Official Remote MAnagement an Monitering system integration.
Would it not be cool to have an integration with TacticalRMM which is an Opensource Remote Management and monitoring system.
the Solution has Agents, which when deployed on Machines, are able to query the information of the device, and if computers, have the ability to remote control those Machines.
the integration would feature, Combined agent deployment, and Assets Mapping between the two platforms
TActicalRMM is completley Opensource, and Available on github here: amidaware/tacticalrmm: A remote monitoring & management tool, built with Django, Vue and Go. (github.com)
The developers of TActicalRMM are OPen to a collaboration with Glpi here: Feature request : ticketing integration · Issue #1710 · amidaware/tacticalrmm (github.com)
IF GLPi is open to the same.

add firmware specificity for item_devices
Hello!
It would be great to have firmware specificity for parts, for example for disks or network card, or raid controllers

Block edition of the ticket description made by the agents.
I request the blocking of the edition of the ticket texts made by the agents. Ticket text can be changed at any time without proper tracking. Ideally, changing the ticket description should be blocked or released only to the technician assigned to the ticket and that the changed text should be recorded in the ticket history.

Add only the last document in ticket notification
The prevent the notification to be rejected by the mail server, add only the last document added in the follow-up of the ticket to the notification. In the overway, the size of the mail may grow to much and could be rejected

Add Cable ID field when we link network ports
It will be nice to add a field named Cable ID when we link to network ports together. This is nice to have because in Datacenter cables management best practices, we need to identify each connected cables with a unique ID to help DC tech (remote hands) to spot the right cable.

one License to multiples softwares
Many software like Adobe software you pay one license to use a group of software, I think is a good option register multiples software with a same license like:
Adobe After Effects CC 2018 | |
Adobe Bridge CC 2018 | |
Adobe Dreamweaver CC 2018 | |
Adobe Illustrator CC 2018 | |
Adobe InDesign CC 2018 |
Actually I need register the same license to each software above...

Associate Contracts to Tickets
I'd like to know if its possible to have a field on the Ticket body (even on the creation) that allows you to associate to a specific Contract from the Entity
The goal is to create and change the SLA of the ticket, based on the selected Contract.
Is this possible?
Best regards!
Customer support service by UserEcho