Salesforce for Outlook Side Panel Associating Emails & Events (WhoId/What Id Limits)
|Knowledge Article Number||000187146|
|Description||What limits are there for associating emails and events in the Salesforce for Outlook Side Panel to Contacts/Leads and also Accounts, Opportunties and other Custom/Standard objects?|
|Resolution||You can associate up to 50 Contacts / Leads to an Email or Event which corresponds to the Name (WhoId) field on an activity record while you can only relate it to one Account, Opportunity or Standard/Custom object which corresponds to the Related To (WhatId) field on an activity record.
NOTE: You can only relate events to Custom Objects that have Activities enabled. The limitation of 50 contacts is related to the Shared Activities feature limit.