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

Knowledge base - link to
I believe the Knowledge base to improve considerabely if when applying a solution to a ticket, just the link to the article was saved instead of the whole content of the article.
It would allow statistics to be very relevant in order to check how many times a solution was applied to the same kind of incident for instance.
As well, it would reduce the database space needed : if I have 50 ticket solved by the same article, I have 51 times the same text, images etc. in my database. A link would be way lighter !

Warranty Expiration Date
A setting to list the "warranty expiration date" as expired when its past the date.

Operation Master Plan
Hello
We would like to use GLPI to create an operation master plan report

SLA : Can link calendar for technician groups
For example, I have 2 technician groups G1 & G2 :

Send invitation in Planning
It would be useful to send invitation for appointment from glpi planning to users.

Hide field at ticket creation but view this filed after in read only
When you create a ticket, i want to hide "SLT option" and "Temps de prise en charge", etc...
But after, when i read the ticket, i can't see this information...
I affected this option by SLA and rules directly :
- VIP SLA for VIP user tickets
- Standard SLA for all other ticket and user
It works fine, but i want to hide this option at the creation, but not after for the followed

[Improvement][Ticket] Convert task to follow and vice-versa
Can you add an option to convert a task in a follow in the ticket tracking system ? Often another operator made this kind of mistake (write a task instead of follow) and we cannot fix it.

add a message during root entity ticket creation.
Hello
To avoid ticket creation on root entity it would be useful to add an option in general settings permitting to add a message during root entity ticket creation.
Example : Warning you are on root entity !
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