Outlook.com Calendar birthdays sync issue

Today most birthdays were again missing.

The error was present on different computers logged on with the same account.

I reviewed two of the entries. 

The first was a People account which consisted of an  Outllook and Facebook profile linked together.

Both account contained birthday information.  I unlinked the profiles and refreshed the calendar. 

Two birthday entries appeared.  One for each profile.

The other reviewed case consisted of only an Outlook profile.  I first edited the account and saved it without making changes.  Refreshed the calendar.  No change.

I then added a new birthday item using the same name.  The birthday was immediately visible.   After a minute or so, a second Outlook profile for this person was in people.  I merged the two records and refreshed the calendar.  The entry remained visible.

Other entries consisting only of an Outlook profile are still missing!

I was on the Answer Desk for 3 hours, so you might want to get hold of that log. After that I deleted my birthday calendar, created a new one, deleted all birthday events, re-entered them and cleaned up my contacts on https://people.live.com/

@Karla

Like Dansercoer said, the problem is when both Facebook and Outlook contain birthdays.

If no Outlook record exists, the Facebook birthday (if existent) is shown. 

If no Facebook birthday exists, the Outlook birthday (if existent) is shown. 

This error only applies to "linked" profiles.

As soon as the profiles are "unlinked" and the calendar is resynced, the birthdays reappear.

As Dansercoer stated, deleting the outlook birthdates is not an option because the Facebook profile can be altered by the owner without our knowledge.

Also unlinking the profiles results in our contact list being cluttered with several same name entries.

Also, not an option. 

@Karla, I did some more testing. It appears that when a Skype profile is linked then the birthday is lost.  If I unlink the Skype, but leave Outlook and Facebook linked, the birthday reappears after refreshing the calendar.

Hello,

@m@rk:

Kindly read the reply I've sent in the private message area. To view it, just click on the "You have a private reply to this message" link above your post and make sure that you are signed in to the forum to view the link.

@RalphLea_771 and Dansercoer:

Thank you for bringing this matter into our attention. Before we continue, we would like you to post back with additional details about the issue you're experiencing with the birthday calendar and with the troubleshooting steps that you have performed before you contacted us. This would help us determine the steps that we should take to proceed with the investigation and to help you resolve this problem.

We highly appreciate your cooperation regarding this matter.

Thank you.

The people who disappeared from my birthday calendar have their birthdays in two linked profiles (e.g. Outlook and Facebook), which looks like a bug. I could unlink all profiles or re-enter all birthdays as yearly appointments, but I’d rather not.