May 01 2020 10:02 AM - edited May 02 2020 01:27 AM
Jun 03 2020 03:59 AM
@krishna2320 , we experience the same issue.
How does your environment look like and in what mode is teams running?
We are still in hybrid with legacy Lync 2010 (proxy also used for federation), the tenant is in Teams island mode but some users are in Teams Only mode.
Would be helpful to understand if the issue is related to our setup or not.
Jun 04 2020 11:57 PM
Sep 15 2020 08:07 AM
I experienced the same thing. Follow this process to fix it:
Dec 01 2020 07:34 AM - edited Dec 01 2020 07:36 AM
@Jaisson Hi i followed your process i did remove files and folder from %appdata%\Microsoft\Teams
and it worked for the use.
Now after a month user is contacing me with the same issue.
So it work as workaround but i need a better solution.Thanks
Dec 10 2020 01:07 AM
So let me share my solution to this problem. I had this same error with one of my internal organization contact showing as external. Digging deep I found we had a contact created for that user pointing to his external private email (also Teams enabled).
External contact email attribute was: username@CompanyNA.mail.onmicrosoft.com
Checking AD attribute for that internal user showed attribute: targetAddress: username@CompanyNA.mail.onmicrosoft.com (basicly pointing to that contact address)
Changing targetAddress attribute to: username@CompanyNA.onmicrosoft.com resolved our issue.
Somehow our internal user get linked with that contact address.
Hope that helps someone.