This evening I noticed several birthdays appeared TWICE in my birthday calendar. Both on outlook.com and in my phone, so synchronisation between Outlook and phone seems to work correctly.

What I tried:

- I removed the entire birthday calendar on Outlook.com

- Synched with my phone, in order to remove the birthday calendar from my phone

- Then re-added the birthday calendar on Outlook.com.

- Synched with my phone again, to re-add the birthday calendar.

Now there are no more duplicates, but several birthdays there were previously there, now are MISSING. There are several examples of contacts that do show a birthday in the contact details on Outlook.com (and on my phone), but who do NOT have a birthday in the birthday calendar. So this error even has nothing to do with my phone, within Outlook.com the birthday calendar is incorrectly populated from the contacts that are also on Outlook.com.

 

 

I have one example of a Facebook contact who has it´s birthday registered in it´s Facebook account. This contact is shown on my phone with birthday, but on Outlook.com without birthday. Most other details for this contact (names of children etc) are visible on my phone but invisible on outlook.com. The birthday for this contact is missing in the birthday calendar.

 

What I tried:

- Removed Facebook, Linkedin and Twitter accounts

- Checked that all contacts were removed from phone and Outlook.com, and all linkes were gone.

- Reset my phone to factory setting without restoring a backup

- Set up my phone from scratch, linking all accounts one by one...

 

Still the exact same error.

 

I've also noticed on several occasions that after accepting new friends (e.g. Facebook), those friends are sometimes added as contacts automatically (which they should), but sometimes it requires a manual re-synchronisation.