[DOCS] Assign users to Observability cases (#2267) (#2268)

(cherry picked from commit 2e5fa93)

Co-authored-by: Lisa Cawley <[email protected]>

docs/en/observability/create-cases.asciidoc

@@ -1,9 +1,11 @@
 [[create-cases]]
 = Cases
 
-Cases are used to open and track observability issues directly in the Elastic {observability} app.
-All cases list the original reporter and all the users who contribute to a case (participants).
-You can also send cases to third party systems by <<cases-external-connectors,configuring external connectors>>.
+Cases are used to open and track observability issues directly in the Elastic
+{observability} app. You can add assignees and tags to your cases, set their
+severity and status, and add alerts, comments, and visualizations. You can also
+send cases to third party systems by
+<<cases-external-connectors,configuring external connectors>>.
 
 [role="screenshot"]
 image::images/cases.png[Cases page]

docs/en/observability/grant-cases-access.asciidoc

@@ -19,6 +19,12 @@ a|
 
 NOTE: Roles without `All` *{connectors-feature}* feature privileges cannot create, add, delete, or modify case connectors.
 
+| Give assignee access to cases
+a| `All` for the *Cases* feature under *{observability}*.
+
+NOTE: Before a user can be assigned to a case, they must log into {kib} at
+least once, which creates a user profile.
+
 | Give view-only access for cases | `Read` for the *Cases* feature under *{observability}*.
 
 | Give access to view and delete cases | `Read` for the *Cases* feature under *{observability}* with the deletion sub-feature enabled.

docs/en/observability/manage-cases.asciidoc

@@ -8,29 +8,35 @@
 Open a new case to keep track of issues and share the details with colleagues.
 
 . Go to *Cases* -> *Create new case*.
-. Give the case a name, add any identifying tags, and enter a description.
+. Give the case a name, severity, and description.
 +
 TIP: In the `Description` area, you can use
 https://www.markdownguide.org/cheat-sheet[Markdown] syntax to create formatted text.
 
+. Optionally, add assignees and tags. You can add users only if they meet the
+necessary <<grant-cases-access,prerequisites>>.
+
 . Under External incident management system, select a <<cases-external-connectors,connector>>. If
-you’ve previously added one, that connector displays as the default selection. Otherwise, the
+you've previously added one, that connector displays as the default selection. Otherwise, the
 default setting is `No connector selected`.
-. After you’ve completed all of the required fields, click *Create case*.
+. After you've completed all of the required fields, click *Create case*.
 
 [discrete]
 [[manage-case-observability]]
 == Manage existing cases
 
-You can search existing cases and filter them by tags, reporter, and status: *open*, *in-progress*, or *closed*.
+You can search existing cases and filter them by assignee, severity, status, and tags.
 
 To view a case, click on its name. You can then:
 
 * Add a new comment.
 * Edit existing comments and the description.
+* Add or remove assignees.
 * Add a <<cases-external-connectors,connector>> (if you did not select one while creating the case).
 * Send updates to external systems (if external connections are configured).
+* Edit tags.
+* Change the status.
+* Change the severity.
+* Refresh the case to retrieve the latest updates.
 * Close the case.
 * Reopen a closed case.
-* Edit tags.
-* Refresh the case to retrieve the latest updates.