After a 3 month long ticket and this getting escalated to the product team we have been told Outlook on the Web desktop notifications are not intended to work with GCC tenants.
There is no documentation and it took that long and escalations to get that response.
This is the response from the escalation team when asking for documentation.
"There really is no documentation that exists regarding this. There are a significant number of small features missing from O365 that are not documented. This feature was not deemed large enough to warrant creating exclusive documentation.".
For us and I would assume for others email notifications are a significant functional feature.
They just told us to leave feedback but GCC accounts are locked out of feedback..
[Case #:31181564]