Error message in "Post Incident Details" action in MS Teams Graph SpokeIssue Issue with OOTB action "Post Incident Details" action in MS Teams Graph Spoke.SymptomsError found in the execution of the action "Post Incident Details" {"error":{"code":"Forbidden","message":"InsufficientPrivileges","innerError":{"code":"1","message":"AclCheckFailed-The initiator 8:orgid:ea8aa50c-e65c-48ac-a0af-69f75690d771 is not a member of the roster 92:zPX48XDzTgI88JAPj8RXgr38ZUr76-TYsBzWUE45aYY1-gc@thread.tacv2 in the generic thread 19:zPX48XDzTgI88JAPj8RXgr38ZUr76-TYsBzWUE45aYY1@thread.tacv2","date":"2026-02-12T15:08:31","request-id":"7a57e4a0-d0da-4bff-8ab9-cfca24b46426","client-request-id":"7a57e4a0-d0da-4bff-8ab9-cfca24b46426"}}} ReleaseNAResolutionPlease create a service account and the same service account can be reused across all channels. From a configuration perspective, there is no difference between setting up a service account and a regular user account where all existing setup steps remain the same. Instead of creating a separate user account for each channel, you can use a single service account, provided it is already a member of the respective channel, to authenticate with the Microsoft Graph API and send messages. This requirement is due to a limitation of the Microsoft Graph API, which does not support application permissions for sending channel messages. To send a message to a Microsoft Teams channel via the API, the authenticating user must be a member of that channel. The API does not support posting messages to channels where the user is not a member. This limitation is also explicitly mentioned in the API reference documentation shared below. 👉 https://learn.microsoft.com/en-us/graph/api/channel-post-messages?view=graph-rest-1.0&tabs=http