Which parameter must be set for the end user for Jabber for Windows or Mac to register successfully with Cisco Unified Communications Manager in softphone mode?
A. primary extension
B. group membership
C. subscribe calling search space
D. remote destination profiles
E. device association
Answer is A
Because asking about Softphone mode, for more details refer to this link:
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/jabber/12_0/cjab_b_on-premises-deployment-for-cisco-jabber-12/cjab_b_on-premises-deployment-for-cisco-jabber-12_chapter_01010.html
Only device association is needed for registration. Setting the primary extension results that the extension gets the Directory URI of the user. Primary extension can be set after a device got associated to the user.
it should be question with two options. CAPPS Foundation Learning Guide on page 290 says:
Follow the list to set up a Cisco Unified CSF device for Cisco Jabber in softphone mode:
■ Configure the end user:
■ Create and associate the new CSF device. (E)
■ Set the primary extension. (A)
■ Enable User for Unified CM IM&P.