Thanks everyone for your comments and help. This is what I have been trying to accomplish:
I have a user at ext 123 that I needed to give callers options when they were sent to coverage. I changed their vm box in Audix to auto-attendant and had this person change there greeting with the options. Then, I created another vm box ext 456 and had her to create her voicemail greeting. Back on the Definity station form, I changed ext 123 the message lamp ext= 456. At this point, it would work but no message waiting light on ext 123 for mailbox 456. So, when I created a dummy station x456 on the Definity the MWI started working.
Now, I know to not allow a message to be left you should create a bulletin board ext on the Intuity, but only the auto-attendant gives the caller options. I still don't know how to deal with someone in our company forwarding messages to her ext 123 when now her actual mailbox is 456. This lady may have a message and not be aware of it.
Again, my thanks to all of you that make this a great forum!