Office365 integration/Sync - Reset sync data on an individual extension?

[EricHY]

I have successfully setup the Office365 synchronization. I'm synching calendars and contacts only.
My first question: What is the synching linked to? Is it name, email address, extension?

My current problem: I created 2 extensions but entered their contact information reversed causing to their calendar and contact info to also be reversed.
How can I fix this? I corrected their contact information (name, email address) but the synched data hasn't fixed itself in 24 hours.
I'd rather not blow away the extensions and recreate them but can if its the only way. But I'm not even sure that will fix it.

Suggestions?
Thank you.

 

[EricHY]

I may have solved my problem, but if anyone has other ideas please share.

I unchecked the Calendar and Contacts sync options under Microsoft 365 Integration, then rechecked them. It appears to have forced a re-sync of everything.