Can send but not receive e-mail

Hi,

I have just migrated to Office365, but have problems:

- 4 of 5 steps are configured to set it up

- About the domain setup, my ISP has done the proper change on the TXT/MX records

- My ISP will not change DNS to Microsoft, but this should not be required.

Problem still is that I can send e-mail from the mailboxes, but no mail is received in the New Office365 mailboxes. Mail is also not received in the old mailboxes.

Please help, regards, Henrik