Hi Diane Nagel,
From your description, this would typically point to a permission based configuration in your instance, however as you mention that this user is configured with the same permissions as a user who has access to the message feature I would recommend submitting a case in your customer group ( MyJive Secret Support Group Administration FAQ ) as a next step so that a member of our support team can perform further investigations into your specific instance. When submitting the case, if you could include the following information it should assist with their investigation:
1. username of account unable to send messages
2. username of an account configured with the same permissions that is able to send messages
Hi Jesse -
You are correct. I discovered this myself last night. We can close this ticket.