If you change expiration date of repeated task it dupplicates


New Member
Outlook version
Outlook 2013 64 bit
Email Account
Exchange Server 2013

I have a task that must be generated,automatically, each Monday of every week.
When I create this task an expiration date is associated without my permission.
When I delete this date and save the task, the task becomes duplicated.
The main task remanis with expiration date.

I want to delete expiration date without dupplicate the task.

Anyone knows how to do it?

Thank you very much.