This task requires permissions that are found in all default security roles Defined sets of privileges.The security role assigned to a user determines which tasks the user can perform and which parts of the user interface the user can view. All users must be assigned at least one security role in order to access the system.. More information about specific permissions and performing this task while offline: E-mail Permissions
E-mail messages that appear as red text with the Unresolved Address button cannot be matched to records in Microsoft Dynamics CRM Online. These messages contain e-mail addresses that are either not related to a user, account, contact, or lead record, or are related to multiple records. You can match the e-mail address to an existing record or create a new record.
Open the message.
Double-click the unresolved e-mail address.
In the Resolve Address dialog box, do one of the following procedures: