OneRoster API Integration Token problem

[Javier Oliver]

Hi, I have some problems obtaining the bearer token.

I have tried the two methods, A (client credentials flow) and B (authorization code flow) unsuccessfully.

Method A, 

It works perfectly for me with the demo server, but as soon as I try it on the url provided by the district, I get a 400 error (bad request), but I do it in the exact same format.

Method B, 

I perfectly receive the "authorization_code" but as soon as I go to request the bearer token, I receive a 403 forbidden error "You do not have permission to view this directory or page using the credentials that you supplied" .

Both methods work perfectly for me with the demo site, but not with two districts that have asked us for this integration.  

The 2 base urls that we must solve are the same format in case it serves as a clue: 

https://XXXXXX.asp.aeries.net/student/

Best regards

[Javier Oliver]

In all cases I pass the received cookie so I don't think this is the problem.