error messages on texting from Teams to Skype for Business

Question

We are using M365 Teams and the other side uses on-premise skype for business.
We can receive the message, but when we send the message to the other party, we get the following error.

"We ran into a problem sending your message. Please share diagnostic code 403/1002 with your admin to help them troubleshoot the issue."

How can I find the solution for this diagnositic code? I couldn't find it yet.

Answer 1

Hi @Ouk Choi

Is the Skype for Business user is in your organization or the external user?

For Skype for Business, did they deploy the bybrid environment?

If it is external user. please check if the contact user's domain is allowed in Microsoft Teams Admin Center > Org-wide settings > External access.

The coexistence mode also has impact on your situation. If the user in your organization is in Islands mode, chats and calls from Skype users to Teams users are delivered to Skype for Business.
For more information about the requirements and limitations of interoperability between Teams and Skype, please read this official document.

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Answer 2

Ich kann nicht Gruppen beitreten und Nachrichten schicken.

ich habe kein Zugriff.

könnten sie bitte mir helfen ich habe Projekt für Uni