Hi

We have found an issue with the methods related to calendar event registration in Relate+ /Community (3.2.5).
CalendarHandler.GetRegistration()

If a community user (IUser) does not have an email address set, the handler does not return the correct Registration. 

The issue can be reproduced with the following steps:

1. Create two users with empty emailaddress.
2. Login as "User 1"
3. With "User 1" click "Attending" on a Club Event.
4. Login as "User 2" 
5. Go to the same event as before. RSVP will show "Attending". 
6. If you click "Not attending" User 1's registration will be removed.

Does anyone know how to fix this issue?
Or is the only way to ensure that all users have a unique email. 

We have no email on our users because the WindowsMembershipProvider overwrites the email when it syncronizes.

Regards Niels