As mentioned in the subject line, we are strangely getting "403 Forbidden" error after 12:00 Noon EST but it works perfectly alright until 12:00 Noon EST. This started happening since last Monday. We followed all the coding guidelines given in the Vuforia documentation and it has been working alright for nearly 5+ months.
According to the documentation, There are only two situations we get 403 forbidden error which we have taken care already in the code
1) Duplicate target name – This will not come in our case as we generate unique target name for every marker
2) RequestTimeTooSkewed – We have taken care of this and it works until 12:00 Noon EST.
Right now, we are done with our development and beta testing underway and we are gearing up to go live but due to this strange behavior we could not move forward. We appreciate quick support either from community or Technical support engineer.