How to find who change the Teams Coexistence mode from Teams only to Island mode

[sandipk]

We have a situation where Teams Coexistence mode changed to Island mode recently and many external users unable to see teams status .

I would like to know how to find who changed the Teams Coexistence mode  .

I tried from Audit log search for Microsoft Teams activities -> changed oranization setting . But did not find any logs.

Is there a way to find out who made changes using admin audit log and powershell

[#2]

@sandipk 

As per Microsoft's documentation, it should be included under the Changed organization setting when using the Teams - Audit Logs. 

Friendly Name: Changed organization setting

Operation: TeamsTenantSettingChanged

Description: The TeamsTenantSettingChanged operation is logged when the following activities are performed by a global admin in the Microsoft 365 admin center. These activities affect org-wide Teams settings. To learn more, see Manage Teams settings for your organization.
For each of these activities, a description of the setting that was changed (shown in parentheses) is displayed in the Item column in the the audit log search results.

- Enables or disables interoperability between Microsoft Teams and Skype for Business for the organization (Skype for Business interoperability).

I tried to test it by changing my interoperability from Islands to SkypeForBusinessWithTeamsCollaboration and search it under Audit Log but nothing shows also. I am not sure if it's propagating or loading on the backend but let me check tomorrow. 

Also, try to expand the time on your search. 

[#3]

Update: Just checked it again but nothing shows up on the Audit Log for Teams - Changed organization setting.

[#4]

@Germaum Did you ever find a solution or root cause for this?