I have used both GAM and the Google Groups API to script the following:
"whoCanPostMessage":"ALL_IN_DOMAIN_CAN_POST"
By default, this also includes ALL_MEMBERS_CAN_POST.
I DO_NOT want members to be able to post.
Is there any way to exclude All_Members when you want ALL_IN_DOMAIN??
(I know I could do it manually, one-by-one, through the Google Admin Console, but that would be very tedious and time consuming)
Please help!
According to the Groups Settings API documentation, possible settings for this attribute are:
NONE_CAN_POST ALL_MANAGERS_CAN_POST ALL_MEMBERS_CAN_POST ALL_IN_DOMAIN_CAN_POST ANYONE_CAN_POST
as you've seen in testing, setting this attribute to ALL_IN_DOMAIN_CAN_POST also adds ALL_MEMBERS_CAN_POST. There's no way to select ALL_IN_DOMAIN and not ALL_MEMBERS via the API.
来源：https://stackoverflow.com/questions/13774278/google-groups-post-permissions