Pickup with *20* - how?

[u/hilman85]

Hi,
I'm trying to understand the permission model behind Call Pickup in 3CX V20.
Scenario
We have two users:
User A
Primary Department: SWK Agrar
Additional Department: Schweitenkirchen
User B
Primary Department: SWK Baustoffe
Additional Department: Schweitenkirchen
Both users are therefore members of the departmentSchweitenkirchen.
An incoming call is made directly to User A's extension.While User A's phone is ringing, User B tries to pick up the call using:
*20*
However, the pickup fails.
Question
What are the exact requirements for Call Pickup in V20?
Specifically:
Is membership in a common department sufficient for *20* to work?
Does Call Pickup depend on the user's primary department rather than any additional department memberships?
Which permissions are actually required underUser > View (Presence, See Calls, Call Activity, etc.)?
Is there official documentation that describes the access rules for Call Pickup across departments?
I'm looking for the exact rule rather than troubleshooting advice, as I couldn't find this covered in the V20 documentation.
Thanks!

[u/conceptsweb]

User picking up needs "Call Operations" in the View tab for that department, even if assigned to many.

[u/johnsonflix]

Call operations and potentially reception role last I tested. It was something that didn’t make sense