Changing primary email address

I use Google mail and sync my mail to Outlook using the Google app sync tool. 

I stalled the Outlook for Dynamics plug in and it told me the email address in outlook and dynamics needed to match so i updated my primary email address in Dynamics to my work email.

I now have a message in my user profile on dynamics saying: 

I am the system admin, how do i approve the change?

I have tried adding the email to my profile in 365 but it will only let me add onmicrosft email addresses. 

Any help would be appreciated.

Thanks,

Stphen