I have recently installed Dynamics CRM 2013 onto Windows Server 2012 R2. I also have Exchange 2013 running on another Server 2012 R2 system. Successfully linked my CRM account and a test User account to Exchange; incoming and outgoing tested successfuly. All seems to be working fine, with the exception of creating email content. No customization has been done to the email form in CRM 2013, it is standard OOTB . When myself (system administrator) or the test user creates an email all the fields are accessible, such as From, To, Subject, Attachments (after saving), etc. but once I try to click within the email body area to type in the email contents, nothing. The field is locked, test user, nor myself can add anything into the body field to create an email. I've Googled this for the last two days to no avail, desperate need of some guidance.
I've looked at the Form customization form to see if there are any locking selections. Locked selection "Lock the field on the form" is NOT checked. Field behavior "File is read-only" is NOT checked either.