Problem
When viewing Microsoft Teams chats (messages) collected and imported via Merge1, a sender can be listed as unknown.
Error Message
Enabling logging for the Merge1 Microsoft Teams Importer will generate the below warning:
WARN SenderParser - Unknown UserId found: 'unknown'. Will use 'unknown@user.microsoftteams.app' as email.
Cause
This issue can occur when the sender of a Microsoft Teams chat is external to the organization.
Solution
This is expected behavior, however the below workarounds may be desirable.
- Contact external users as a guest user. This is due to the fact that the Microsoft API does not allow capturing external users' events through its API's
- A Filter can be put in place to exclude messages that include address - 'unknown@user.microsoftteams.app' from reaching the target.
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