This happens because the event creator invited you using your old Connect address, <oldnetid>@ucsb.edu. If they have used the old address to invite you in the past, it still exists in their Contacts and was available to select in the "Add: Guests" field. The invitation you receive is non-functioning because you are logged into Connect as <newnetid>@ucsb.edu. For more infomation, please see Changing My UCSBnetID.

When creating meetings, if a person has more than one address, ALWAYS select their @ucsb.edu address. If a person has more than one @ucsb.edu address, either will work. If a person does not have an @ucsb.edu address, they do not have a Connect Calendar account, and selecting their department address will send a meeting invitation email.

Yes, you can "share" your Connect Calendar with anyone who has an @gmail.com address. You can even allow them to "make changes" to your primary calendar. NOTE: although you can assign "make changes" for a custom calendar you created on your account or for a resource, the @gmail.com account will be able to view but not create or modify events on these types of calendar.

How To: Duplicating an event (keeps all attendees):

1. Edit the event that you wish to duplicate. This time look for the More Actions option from the select list and click on it. 
   
    

1. File menu/tab
2. Click Options