Teams incomplete sync with outlook

You have always the option to send invitation to join Teams using the "Invite to Teams" button at the bottom of the People app.

The "Invite to Teams" button creates an invitation link in the device's clipboard. This link can be sent to user's email, SMS or any other communication media.

• Are the nine affected contacts internal users in your Microsoft 365 organization, external contacts, or a mixture of both?
  • Forgive me for maybe not understanding the terminology.  The 9 contacts that will not sync are listed in my Outlook for Mac, People App > Contact List
• If you enter one affected contact’s complete email address in the Teams attendee field, can you add and invite them successfully?
  • The option in which I entered the complete email was sent from Teams.  I confirmed sent in outlook.
  • The option in which I accepted the suggested name did not send as verified in outlook.
• Does Teams find the contact if you search by exact email address instead of their display name?
  • No, it does not
• Does another user in your organization experience the same behavior with these nine contacts? 
  • I am the organizer.  I just started using Teams. I send out all the invites.  So the answer to this question is unknow

If you are signed in to Teams with Microsoft 365 Family account, then your Teams account is not Business account but Personal (a.k.a. Teams Free)

In Teams Personal, there is no "Add contact" option in the People app. This option is only available in Teams for Business.

I'm not sure how this works on a Mac, but on my Windows 11 computer, syncing contacts from Outlook.com adds only Outlook contacts which have a valid phone number. This might be the reason why fewer added contacts than in your Outlook Peoples option.

Hi Robert,

Based on what you shared, since the same nine contacts are missing in both Teams Web and Teams for Mac, this is likely an account- or service-side contact resolution issue.

For the best possible assistance, can you share more details about the situation:

• Are the nine affected contacts internal users in your Microsoft 365 organization, external contacts, or a mixture of both?
• If you enter one affected contact’s complete email address in the Teams attendee field, can you add and invite them successfully?
• Does Teams find the contact if you search by exact email address instead of their display name?
• Does another user in your organization experience the same behavior with these nine contacts?

As a temporary workaround, you can schedule the meeting in Outlook, where all 35 contacts are available. Meetings created in Outlook with the Teams meeting option will also appear in the Teams calendar.

I greatly appreciate your cooperation and understanding. Hope to hear from you soon.

I do not have an option to enter a new contact on the Teams app. I am using Teams, Microsoft 365 for families, desktop, for Mac. Version 26289.204.5281.6363. Likewise, my online Teams for Mac does not have an "Add Contact" option in the upper left corner of the People app. This is why syncing from Outlook is relevant.