Additional features, settings, or issues not covered by specific Microsoft Teams categories
Hello JV_79,
May I confirm with you whether you mean below app:
As far as I know, except for permission in Org-wide app settings, I think you can contact admin, let him sign in Teams admin center -> Teams apps -> Manage apps, search “Incoming Webhook” there to make sure this app is added to the list:
Then in Teams admin center -> Permission policies-> select the polices assigned to your account, make sure third-party app is allowed and that app isn’t blocked there:
Besides, it’s also important to ensure the correct policy has been assigned to your account:
If you just modified related configuration, it needs time for changes to take effect, you may kindly wait for up to 24 hours to see the result.
Please also kindly confirm with other users in your organization whether they’re experiencing the same issue.
If you have any update, welcome back and feel free to share with us.
Kind Regards,
Anna