1) Sales Manager has a new lead that he converts to a contact/account/potentials.

2) Later, the lead decides to call the office and one of our Sales associates (subordinate to the Manager) picks up the phone and searches for the email address (that should be unique) but does not find it, since the associate cannot access the manager's contacts/accounts/potentials.

3) Sales associate decides this is a new lead, inputs it into Zoho CRM (it allows duplicate emails if it is separately in Leads and Contacts) and discloses info that might conflict with what the manager has told.

Any ideas on how to overcome this?  Whether it's a sales workflow issue or something in Zoho CRM that can be modified?